12003results about "Insulated cables" patented technology

The invention relates to the technical field of cables, and discloses a multi-layer composite wrapped high-temperature-resistant anti-aging cable which sequentially comprises a conductor, an insulating cable core, a shielding layer, an outer insulating layer, a fireproof layer, a heat insulation layer, a buffer cushion layer, an armor layer, an anti-aging layer and an outer sheath layer from inside to outside. The fireproof layer is formed by alternately laminating synthetic mica tapes and ceramic boron silicone rubber tapes, a reliable fireproof barrier is formed, and the heat insulation layer is arranged to achieve efficient heat insulation and stable structure through cooperation of gradient pore nano aerogel, ceramic silicone rubber round rods and phase change capsules. The buffering cushion layer is combined with the composite layer, the aluminum oxide hollow ball array and the composite capsule, so that the mechanical buffering and auxiliary heat insulation functions are achieved; the armor layer is woven by stainless steel fibers, the mechanical protection capability is improved, and the anti-aging layer is of a double-layer structure composed of montmorillonite composite fluororubber and an anti-oxidation layer, so that thermal oxidation aging is delayed.

The invention relates to the technical field of power transmission, in particular to a moisture-proof cable which sequentially comprises a conductive wire core, a gradient buffer layer, a dynamic sealing layer, a flexible supporting layer and a self-repairing sheath from inside to outside. A gradient buffer layer; the dynamic sealing layer is of a split type sealing structure formed by an outer ring surface sealing lip and an inner ring surface static sealing belt, the outer ring surface sealing lip is formed by embedding a polytetrafluoroethylene fiber reinforcing layer in a silicone rubber matrix, and the surface of the outer ring surface sealing lip is coated with a humidity response type graphene coating; the flexible supporting layer is formed by spirally winding a nickel-titanium alloy belt, and bionic fish scales are welded to the surface of the nickel-titanium alloy belt; the self-repairing sheath is characterized in that a hexagonal honeycomb structure is molded on the outer layer, hydroxyl-terminated polysiloxane and a platinum catalyst are contained in an A-type microcapsule, and modified epoxy resin is contained in a B-type microcapsule. The moisture-proof cable shows excellent corrosion resistance, moisture resistance and self-repairing capability in a humid environment, and can maintain good performance when subjected to external physical impact.

The invention relates to the technical field of cross-linked polyethylene cables, in particular to a mining cross-linked polyethylene insulated armored self-repairing cable and a manufacturing method thereof.The mining cross-linked polyethylene insulated armored self-repairing cable comprises a center conductor unit, a cross-linked polyethylene insulating layer, a shielding layer and an armored layer sequentially wrap the outer side of the center conductor unit from inside to outside, and an outer sheath layer is extruded on the outer side of the armored layer; the shielding layer comprises a semi-conductive shielding layer wrapping the outer side of the cross-linked polyethylene insulating layer, and the outer side of the semi-conductive shielding layer is wrapped with a copper strip shielding layer. By arranging the composite conductor structure in the central conductor unit and cooperating with the graphene heat dissipation filaments and the paraffin heat absorption and heat dissipation layer, the heat dissipation performance of the cable is improved, the temperature of the cable during operation is effectively reduced, faults caused by overheating are reduced, and the service life of the cable is prolonged; the armor layer and the copper strip shielding layer realize multipoint equipotential grounding through a sectional conductive adhesive tape, electromagnetic interference can be effectively shielded, and fault current diffusion is limited.

The invention discloses a preparation process of a self-repairing intelligent cable and an intelligent repairing system of the self-repairing intelligent cable. The preparation process of the self-repairing intelligent cable comprises the steps of conductor pretreatment, preparation of the inner-layer basic insulating layer, preparation of the middle intelligent regulation and control layer, preparation of the outer-layer repairing layer and preparation of the outermost-layer protective layer. The intelligent repairing system of the self-repairing intelligent cable comprises the steps of damage sensing, repairing strategy selection, repairing triggering and dynamic modeling, performance optimization and closed-loop feedback. The preparation technology of the self-repairing intelligent cable has the following beneficial effects that the preparation technology of the self-repairing intelligent cable can have efficient self-repairing capability and a long-acting protection effect in an extreme environment. The intelligent repairing system can automatically adjust a repairing strategy according to changes of environmental conditions, and it is ensured that the cable can keep good self-repairing capacity in various severe environments.

The invention relates to a photo-thermal super-hydrophobic multifunctional anti-icing coating as well as a preparation method and application thereof. The photo-thermal super-hydrophobic multifunctional anti-icing coating comprises primer and finish paint, the primer comprises the following raw materials in parts by weight: 20-25 parts of bisphenol A type epoxy resin and / or fluorine modified epoxy resin, 10-20 parts of fluorine modified polyacrylic resin and / or polyurethane resin, 5-10 parts of a curing agent and 40-55 parts of a solvent; the finish paint comprises the following components in parts by weight: 2-5 parts of polytetrafluoroethylene, 1-3 parts of soluble polytetrafluoroethylene, 1-5 parts of polydimethylsiloxane and 85-90 parts of fluorinated MOF dispersion liquid. Compared with the prior art, the photo-thermal super-hydrophobic multifunctional anti-icing coating provided by the invention has the characteristics of super-hydrophobicity, rapid ice melting, wear resistance, reduction of ice adhesion strength and reduction of icing amount, can effectively solve the problem of icing of an aluminum conductor of a power transmission line of a power system, and can be applied to power equipment such as the aluminum conductor of the power transmission line.

The invention discloses an anti-fracture low-voltage power cable, and relates to the technical field of low-voltage cables, the anti-fracture low-voltage power cable comprises three core bodies, the surfaces of the three core bodies are all sleeved with shielding layers, the surfaces of the shielding layers are wrapped with insulating layers, the outer sides of the three core bodies are sleeved with an inner protection layer, the surface of the inner protection layer is sleeved with a thermal insulation layer, and the thermal insulation layer is wrapped with an outer protection layer. The outer side of the thermal insulation layer is sleeved with an outer protection layer, the surface of the outer protection layer is provided with a sliding protection mechanism, and the inner side of the outer protection layer is provided with a reinforcing anti-breaking mechanism in an embedded manner. And when the cable slides, the outer protection layer is not rubbed with the ground, so that the outer protection layer of the cable is prevented from being rubbed and scraped to influence subsequent normal use, the cable is protected to a certain degree, and impurities such as dust and soil adhered to the surface of the cable in the cable transportation and laying process can be scraped.

The invention discloses a preparation method of a B1-grade flame-retardant fire-resistant control cable, belongs to the technical field of flame-retardant fire-resistant cables, and aims to solve the technical problem that the mechanical strength and the fire-resistant and flame-retardant performance of an inorganic flame-retardant modified fire-resistant fire-resistant control cable in the prior art need to be further improved. The method comprises the following steps that a plurality of cable cores are arranged in parallel, gaps among the cable cores are filled with filling ropes to form filling layers, the cable cores filled with the filling layers are wrapped together through a wrapping tape, and a wrapping layer is formed outside the cable cores. According to the invention, maleic anhydride modified polyethylene is used as a phase solvent, and polyethylene is cross-linked and enhanced by modified graphite and modified polysiloxane, so that not only is the mechanical strength of the cable material effectively improved, but also the fire resistance and flame retardance of the cable material are improved.

The invention discloses an environment-friendly safe high-voltage smooth aluminum sheath power cable, which relates to the technical field of power cables and comprises a conductor mechanism, and a water blocking mechanism is arranged on the outer surface wall of the conductor mechanism. In the use process, under the action of the waterproof film, a blocking effect can be achieved on permeating rainwater, then under the action of the water blocking tape, the permeating rainwater can be absorbed, gelatinous substances are formed to block a water seepage channel, then the rainwater is further absorbed and blocked through the water absorption expansion materials placed in the containing grooves, and therefore the rainwater seepage effect is improved. Meanwhile, rainwater can be fully absorbed through a water blocking material in the storage box, the rainwater is prevented from continuously permeating into the cable, and the rainwater can be blocked under the action of a waterproof sleeve, so that the cable is protected, the situation that the cable is short-circuited and spontaneously ignited due to the influence of the rainwater during power transmission is avoided, and the service life of the cable is prolonged. And the maintenance cost of the cable is greatly reduced.

The invention relates to a fire-resistant cable and a preparation method and application thereof. The fire-resistant cable comprises a conductor core layer, a silicone rubber insulating layer, a fire-resistant mica filling layer, a shielding layer and a fire-resistant flame-retardant sheath layer. When the magnesium hydroxide flame retardant is prepared, piperazine phytate is added and is adsorbed on the surface of magnesium hydroxide to form electrostatic repulsion or steric hindrance, so that a protective layer is constructed on the surface of a particle, and particle aggregation is prevented. In addition, after the piperazine phytate modified magnesium hydroxide is compounded with the expanded graphite and the zinc stannate, a remarkable synergistic flame-retardant effect is shown, and efficient flame-retardant and fire-resistant performance of the cable material is achieved. The fireproof filler is added in the polypropylene cable sheath layer, so that the flame retardance and fire resistance of the cable are further improved, and it is ensured that the cable does not drip in the combustion process; therefore, the cable can still keep safe and reliable performance under extreme conditions such as fire disasters and the like, and powerful guarantee is provided for personnel safety and fire rescue.

The present invention relates to the technical field of electrical connectors, and in particular to an anti-loosening electrical connector for electromechanical equipment, comprising a coaxially plugged core barrel and a piercing barrel, wherein a plurality of cables are clamped on the core barrel, and the ends of the plurality of cables extend along the radial direction of the core barrel and are evenly distributed around the circumference of the core barrel, and the piercing barrel is provided with a plurality of piercing pieces, one end of the piercing piece is provided with a clamping groove, and the interior of the clamping groove is provided with a cutting section, a pressing section and a conductive section in sequence from bottom to top, the cutting section is used for cutting the insulating sheath of the cable, the pressing section is used for clamping the insulating sheath of the cable, and the conductive section is used for conductive connection with the wire core of the cable, and a clamping ring is rotatably provided on the piercing piece, and the clamping ring is U-shaped; in the initial state, the center line of the clamping ring coincides with the center line of the clamping groove, and the clamping ring can be clamped with the insulating sheath of the cable; the clamping ring can be rotated 90°, so that the insulating sheath is in closer contact with the wire core.

The invention relates to the technical field of power transmission, and discloses a composite single-core power cable, comprising: a composite core composed of carbon fibers, glass fibers and a resin matrix containing a self-repairing microcapsule, the self-repairing microcapsule being capable of releasing a repairing monomer and repairing a microcrack when the composite core generates the microcrack; the conductor layer is arranged around the composite core and is composed of an aluminum conductor containing nano graphene; the insulating layer wraps the conductor layer and is made of a temperature-sensitive polymer material; and the outer sheath wraps the insulating layer and is made of a waterproof corrosion-resistant material. The composite core of the cable can recover more than 90% of original strength (the loss of tensile strength after repair is only 3%, which is recovered from 580Ksi to 570Ksi) within 24 hours after microcracks (such as the depth of 10mu m) generated by mechanical stress or fatigue in the operation process, and the self-repairing mechanism does not need manual intervention or external equipment, so that the self-repairing performance is greatly improved. And the sudden failure of the traditional cable caused by micro-damage accumulation is avoided.

The invention discloses an anti-interference flame-retardant cable, which relates to the technical field of power cables, and is characterized by comprising an outer protection layer consisting of a rubber outer sheath, a metal armor and a protection mechanism, an inner protection layer consisting of a wrapping tape, a fireproof layer and a waterproof insulating layer, and a plurality of groups of guide cores wrapped in the waterproof insulating layer, the rubber outer sheath, the metal armoring and protection mechanism, the wrapping tape, the fireproof layer and the waterproof insulating layer are arranged in sequence from outside to inside, the overall layer of the cable is effectively divided through the protection mechanism formed by a plurality of annular assemblies, and the metal annular seats of the annular assemblies are arranged in the fireproof layer. The annular assemblies can resist the pressure directly generated by the outside of the cable, when torsion is generated outside the cable, the annular seats buffer the external torsion through the springs among the annular seats, the influence on the inner protection layer is reduced to a large extent, in addition, when the cable is connected, the position of the inner protection layer can be finely adjusted through the rotating structures of the annular assemblies, and therefore the stability of the cable is improved. And the connection of the cable is accurate.

The invention relates to the technical field of cable preparation, in particular to an extruded insulation low-voltage power cable and a preparation method thereof.The preparation method comprises the steps that metal wires are twisted into a conductor according to preset twisting parameters, and the conductor is preprocessed; extruding an insulating layer on the surface of the pretreated conductor by using a screw extruder to obtain an insulated wire core; monitoring the diameter of the insulated wire core in real time by using a laser diameter measuring instrument, and determining the fluctuation characteristic type of the diameter of the wire core under a first preset condition; obtaining the eccentricity of the insulating layer and the void ratio between the insulating layer and the conductor; judging the qualification of the extrusion process according to the extrusion comprehensive quality index; under the condition that the extrusion process is unqualified, the qualification of the extrusion process is secondarily judged according to the insulation performance evaluation value; under the condition that the extrusion process is judged to be unqualified for the second time, an adjustment strategy of the extrusion process is determined; and after the insulated wire cores qualified in the extrusion process are twisted into a cable, an outer protective sleeve is extruded. The production efficiency and the product stability of the cable are improved.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant 10kV power cable and a preparation method thereof. The fire-resistant flame-retardant 10kV power cable comprises a conductor and a fire-resistant flame-retardant layer, the fireproof flame-retardant layer is prepared from the following raw materials in parts by weight: 35 to 45 parts of linear low-density polyethylene, 40 to 50 parts of ethylene-vinyl acetate copolymer, 25 to 30 parts of modified aluminum hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 10 to 12 parts of phosphate modified halloysite nanotube, 5 to 8 parts of ZIF-8 loaded zinc borate core-shell particles, 15 to 20 parts of magnesium hydroxide and 2 to 3 parts of silane coupling agent. 0.5 to 1 part of antioxidant, 0.5 to 1 part of calcium stearate and 1 to 1.5 parts of polyethylene wax. According to the cable prepared in the invention, the situation that a conductor is exposed and the fire resistance is lost due to cracking and falling under long-time high-temperature baking is avoided; the continuous effectiveness of the flame retardant at high temperature is improved.

A method for installing a wiring harness into a vehicle including coupling at least one module and the wiring harness to a fixture to form a structure, moving the structure to the vehicle, decoupling the module and the wiring harness from the fixture, coupling the module and the wiring harness to the vehicle, and removing the fixture from the vehicle.

The invention provides a tear-resistant, wear-resistant, low-smoke and non-dripping sheath material as well as a preparation method and application thereof. The tear-resistant wear-resistant low-smoke non-dripping sheath material is prepared from the following components in parts by weight: 25 to 35 parts of metallocene linear low-density polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 6 to 8 parts of compatilizer, 50 to 60 parts of aluminum hydroxide, 10 to 15 parts of magnesium hydroxide, 3 to 4 parts of microencapsulated red phosphorus, 5 to 8 parts of lithium oxide synergist, 4 to 6 parts of silicone master batch, 0.3 to 0.7 part of carbon black master batch and 1.5 to 2.5 parts of coupling agent. The tear-resistant wear-resistant low-smoke non-dripping sheath material provided by the invention has the characteristics of being halogen-free, flame-retardant, tear-resistant and wear-resistant, and a low-smoke halogen-free flame-retardant power cable prepared from the sheath material has the characteristics of high smoke light transmittance during combustion, no dripping and cracking resistance.

The utility model discloses a pressure-resistant cross-linked polyethylene power cable which comprises an outer sheath, an armor layer, an oxygen isolation inner protection layer and a flame-retardant wrapping tape layer which are sequentially arranged from outside to inside, and a pressure-resistant cable core, a plurality of power cable cores and a plurality of interval units are arranged in the flame-retardant wrapping tape layer. According to the power cable, the oxygen isolation inner protection layer effectively prevents oxygen permeation and delays aging of the cable, and the flame-retardant belting layer improves the fireproof performance of the cable. The multiple surrounding plate bodies surround the pressure-resistant cable core, and the spacing plate bodies play a role in separating and fixing the power cable core, so that the pressure-resistant capability of the cable is improved, and the overall structure of the cable is more compact and stable. In addition, the insulating layer is made of the cross-linked polyethylene material, so that the cable has good insulating performance, short circuit can be effectively prevented, the safety and reliability of the cable are improved, and power transmission is stable and efficient.

The invention discloses a heat dissipation mechanism and an installation method thereof, a device applying the heat dissipation mechanism and a cable system. The heat dissipation mechanism is used for dissipating heat of a heat dissipation demand unit. The heat dissipation mechanism comprises an inner heat dissipation sleeve used for being connected outside the inner heat dissipation demand part in a sleeving mode, and the inner side wall of the inner heat dissipation sleeve is used for being attached to the outer side wall of the inner heat dissipation demand part; the outer heat dissipation sleeve comprises a plurality of outer heat dissipation plates, the outer heat dissipation plates are arranged at intervals in the circumferential direction of the inner heat dissipation sleeve, a heat dissipation gap is formed between each outer heat dissipation plate and the inner heat dissipation sleeve, and the outer side wall of the outer heat dissipation sleeve is used for being attached to the inner side wall of the outer sleeve body; the heat conduction pieces are connected between at least part of the outer heat dissipation plates and the inner heat dissipation sleeves; and the elastic pieces are arranged between each outer heat dissipation plate and the inner heat dissipation sleeve in an abutting mode, and each outer heat dissipation plate is configured to be capable of moving in the radial direction of the inner heat dissipation sleeve.

The invention discloses a convenient-to-connect medium-voltage cable, and relates to the technical field of power cables, the convenient-to-connect medium-voltage cable comprises a cable body, a plurality of cable cores are installed in the cable body in the circumferential direction at equal angles, a built-in sleeve is installed on the inner side of the cable body, an air bag is installed in the built-in sleeve, and a plurality of ring strips are evenly installed on the outer wall of the built-in sleeve at equal intervals; according to the invention, double dispersion and buffering of external impact pressure can be realized, so that the cable can adapt to a more severe and complicated external environment, the external impact force can be converted into defense force for inhibiting further deformation of the cable body, and the cable can be prevented from being damaged. The external impact force is prevented from being directly applied to the cable core, the cable appearance is endowed with the automatic repairing capability, the cable body can be prevented from being directly and rigidly pulled, the external pulling force and the bending stress can be dispersed in the radial direction of the cable, and more comprehensive and reliable protection on the cable core is achieved.

The invention discloses a cold-resistant 35kV power cable, and relates to the technical field of cables, the outer side of an inner conductor is provided with a heat insulation support assembly, the outer side of the inner conductor is coated with an inner insulation layer, a heat conduction wire is embedded in a heat conduction groove, the outer side of the inner insulation layer is sleeved with an isolation pipe between adjacent corrugated support pipes, and two sides of the isolation support are uniformly provided with support springs. The inner conductor can dissipate heat in the power-on process, the heat is transferred to the spiral mica tape and the heat conduction strip through air, the air inlet pipe is connected with the air outlet position of an air pump, in the forced flowing process of air, the heat conduction switch assembly is arranged between the two arc-shaped spring plates, and the heat conduction switch assembly is arranged between the two arc-shaped spring plates. Heat exchange is carried out in a low-temperature area and a high-temperature area between the inner insulating layer and the outer insulating layer of the cable, so that the temperature distribution in the cable is more uniform, the condition of local damage of the cable caused by uneven cold and heat is prevented, the application range of the cable is wider, and the service life of the cable is longer.

The invention discloses an intelligent early-warning cable system, and the system comprises a magnesium oxide mineral insulated fireproof cable which is composed of a conductor, two hollow seamless round copper pipes, two transmission optical fiber units, a magnesium oxide powder insulating layer, and a sheath. The DAS is connected to the single-mode transmission optical fiber unit to detect vibration information of the magnesium oxide mineral insulated fireproof cable; the DTS distributed temperature sensor is connected to the multimode transmission optical fiber unit to detect the temperature information of the magnesium oxide mineral insulated fireproof cable; the data analysis module is connected to the DAS distributed sonic sensor and the DTS distributed temperature sensor, and determines a risk according to the vibration information detected by the DAS distributed sonic sensor and the temperature information detected by the DTS distributed temperature sensor; and the data early warning module is connected to the data analysis module and executes corresponding early warning measures according to the risk condition determined by the data analysis module. According to the intelligent early warning cable system, the intelligent early warning function of the rigid fireproof cable can be realized.

The invention discloses a compression-resistant explosion-proof cable, which comprises conductors, an inner protective layer, an insulating layer, a shielding layer, a filling layer, a belting layer, an armor layer and an outer sheath, and is characterized in that a plurality of groups of buffer layers are arranged between the belting layer and the armor layer in a sleeving manner, and the plurality of groups of buffer layers are distributed at equal intervals along the length direction of the cable. Through the arrangement of a fire extinguishing agent and flame-retardant cotton, when a fire disaster occurs and a buffer layer catches fire, flames are blocked by the flame-retardant cotton in a buffer cavity, so that the flames burn the elastic piece in an extruded state, and when the elastic piece in the extruded state is burnt out, the fire extinguishing agent in the elastic piece can be rapidly sprayed out through the internal and external pressure difference to extinguish the flames; high temperature is prevented from being conducted to the conductor and the insulating layer, working time is prolonged, flame is prevented from continuously burning to damage the conductor, when the whole cable is twisted, resistance is formed through the elastic force of the elastic piece and the guide block, the cable is prevented from being twisted to damage the conductor, and therefore the safety of the cable is improved, and the service life of the cable is prolonged.

The invention provides a network cable with a dehumidification function. The network cable comprises an outer protective layer, a central shaft and a plurality of sliding assemblies, the outer protective layer is provided with an accommodating cavity; the central shaft is rotatably arranged in the accommodating cavity; the multiple sliding assemblies are arranged between the outer protective layer and the center shaft, each sliding assembly comprises a sliding frame, a wire core and an elastic structure, the sliding frame can slide in the radial direction of the center shaft, and the wire core is arranged in a wire cavity formed in the sliding frame; the elastic structure is clamped between the sliding frame and the outer protective layer, is connected to the outer protective layer and is provided with an air channel, the sliding frame is provided with a micropore, and the micropore is communicated with the air channel and the wire cavity; when the center shaft rotates, the center shaft can abut against the sliding frame to move in the radial direction of the center shaft so that the elastic structure can elastically deform, and the air channel can be opened or closed based on the elastic deformation of the elastic structure.

The invention provides an axial anti-pulling water-blocking cable, and relates to the technical field of water-blocking cables, a cable core is spirally twisted on a central anti-pulling bearing unit, the central anti-pulling bearing unit is used for bearing main pulling force, and due to the winding mode of the cable core, when the cable core is subjected to pulling force, the cable core can be prevented from being damaged. The cable core can extrude the central tensile bearing unit towards the center so as to obtain a certain extension buffer space, so that the conductor is prevented from being broken, and the liquid foaming agent capsule in the central tensile bearing unit is extruded and broken by utilizing an extrusion force exceeding a limited value; therefore, the first foaming agent in the cable penetrates through the woven central tensile bearing unit to be combined with the second foaming agent in the twisting gap of the cable core, a large amount of foam colloid is generated, a high-stress area, where water leakage possibly occurs, of the cable is pressurized and subjected to leaking stoppage, and active response to water blocking according to local stress sudden change is achieved. Compared with a traditional passive water blocking technology, the response speed is higher, and the water blocking effect is better.

The present invention relates to the technical field of wires and cables, and in particular to a high-temperature and high-voltage cable for an energy storage device and a manufacturing method thereof, comprising: a plurality of wire cores, a flame-retardant filling layer, a sheathing layer, an armor layer and an outer sheath, wherein the wire core comprises a conductor with a circular cross-section, the outer side of the conductor is coated with a protective layer, a gap filling layer is provided between the conductor and the protective layer, and the gap filling layer is formed by filling a plurality of matrices provided with a conductive skin layer and a phase-change heat storage inner layer; the matrix can fill the cuts formed on the outer side of the conductor due to twisting, and the conductive skin layer enables the gap filling layer to conduct electricity, thereby balancing the electric field and avoiding local discharge, and at the same time, through the heat absorption and heat release of the phase-change heat storage inner layer, the heating and cooling rates of the conductor can be slowed down, thereby reducing the influence of high-frequency thermal expansion and contraction on the material, and avoiding the formation of a gap between the conductor and the protective layer due to thermal expansion and contraction.

The invention belongs to the technical field of cable connectors, and particularly relates to a cable connector and a cable, the cable connector comprises a male head and a female head, the male head is provided with a positioning groove, a plurality of insertion rods used for being inserted into the positioning groove are elastically installed in the female head, a control ring is rotatably installed on the female head, and a rotating ring is fixedly installed on the inner wall of the control ring. Arc-shaped pushing blocks used for pushing the inserting rods are fixedly installed at the bottom end of the rotating ring, the number of the arc-shaped pushing blocks is consistent with the number of the inserting rods, arc-shaped grooves are formed in the side wall of the control ring, positioning blocks are slidably installed in the arc-shaped grooves, connecting rods used for being connected with the positioning blocks in an inserted mode are arranged on the male head, and limiting assemblies are arranged on the positioning blocks and used for limiting rotation of the control ring. The control ring is provided with a release assembly used for releasing limitation of the limiting assembly on the control ring, the female head is provided with a monitoring assembly, and through cooperative use of the structures, the connection stability of the male head and the female head can be improved.

The invention discloses an anti-ultraviolet aging low-voltage power cable, and relates to the technical field of cables, the anti-ultraviolet aging low-voltage power cable comprises a fixed wire core, the fixed wire core is provided with a buffer processing assembly, the buffer processing assembly comprises an inner limit insulation sleeve, and the outer side of the fixed wire core is sleeved with the inner limit insulation sleeve. A plurality of clamping connection grooves are formed in the outer side end of the inner limiting insulation sleeve at equal intervals, a plurality of heat exchange integration frames are clamped to the outer side end of the inner limiting insulation sleeve at equal intervals, and protruding clamping frames are laid at the outer side end of the inner limiting insulation sleeve and one ends of the inner sides of the heat exchange integration frames. The situation of high-temperature aging in the cable caused by unbalanced heat production in the cable and poor heat conduction efficiency is avoided, different deformation in the cable caused by different thermal expansion and cold contraction at different positions is reduced through thermal uniformity, and the situation of dislocation damage in the cable is further reduced in cooperation with elastic stretching and elastic supporting. Therefore, the operation stability of the cable is effectively improved, and the service life of the cable is effectively prolonged.

The invention provides a tearable high-speed parallel line. The tearable high-speed parallel line comprises an outer sheath and a plurality of parallel line pairs, an accommodating cavity is formed in the outer sheath, a first tearing line groove is formed in the outer circumferential surface of the outer sheath, and a first positioning groove is formed in the inner circumferential surface of the outer sheath; a plurality of parallel line pairs are arranged in the containing cavity, the parallel line pairs are arranged in parallel, each parallel line pair comprises a line pair body and at least two rotating pieces, a rotating groove is formed in the peripheral face of each line pair body, the rotating grooves are arranged around the axis of the line pair body, and the rotating pieces are arranged around the axis of the line pair body. The at least two rotating pieces are partially and rotatably arranged in the rotating groove; wherein the first positioning groove is configured to accommodate at least part of the area part, located outside the rotating groove, of the rotating piece, and at least one rotating piece of the parallel line pair is configured to abut against the rotating piece of the adjacent parallel line pair.

The invention discloses a polyethylene cable with flexibility and fire resistance and a preparation method of the polyethylene cable, and relates to the technical field of polyethylene cables, the polyethylene cable comprises a cable core and a polyethylene protective sleeve, the polyethylene protective sleeve comprises the following components, the plastic is prepared from the following components in parts by mass: 50 to 70 parts of low-density polyethylene, 20 to 30 parts of modified polyolefin elastomer, 10 to 25 parts of lignin modified copolymer, 0.5 to 1 part of antioxidant, 0.6 to 1.2 parts of zinc oxide and 1 to 2 parts of talcum powder. The modified polyolefin elastomer is prepared from POE-g-MAH (Polyolefin Elastomer-g-MAH) and a DOPO Schiff base derivative; the lignin modified copolymer is prepared from lauryl methacrylate, isobornyl methacrylate and a lignin macroinitiator.

The invention discloses a crosslinked polyethylene reinforced high-strength insulating aerial cable, and belongs to the technical field of crosslinked polyethylene cable materials.The crosslinked polyethylene reinforced high-strength insulating aerial cable is prepared by the steps that hydroxyl is introduced to nano boron nitride powder, then amino is grafted through KH-550, nano alpha-Al2O3 powder is modified through gamma-glycidyl ether oxypropyl trimethoxy silane, and the cross-linked polyethylene reinforced high-strength insulating aerial cable is obtained; the preparation method comprises the following steps: preparing low-density polyethylene, compounding the low-density polyethylene with aminated nano boron nitride powder to form nano composite powder, improving the interface bonding force between the low-density polyethylene and the nano composite powder, carrying out melt blending on the low-density polyethylene and the nano composite powder to improve the dispersity of the nano composite powder in the low-density polyethylene, and carrying out nucleophilic acyl substitution reaction to obtain a fluorine-containing modified monomer. The nano boron nitride powder and the nano alpha-Al2O3 powder are subjected to a cross-linking reaction under the initiation action of an initiator and then coat the exterior of the thermal insulation layer, and the nano boron nitride powder and the nano alpha-Al2O3 powder are bridged through siloxane bonds to form a three-dimensional heat-conducting network, so that the heat resistance of the outer insulating layer is improved.