CN111029005B - Light variable frequency flexible cable for ship and marine platform and manufacturing method thereof - Google Patents
Light variable frequency flexible cable for ship and marine platform and manufacturing method thereof Download PDFInfo
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- CN111029005B CN111029005B CN201911404883.1A CN201911404883A CN111029005B CN 111029005 B CN111029005 B CN 111029005B CN 201911404883 A CN201911404883 A CN 201911404883A CN 111029005 B CN111029005 B CN 111029005B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/041—Flexible cables, conductors, or cords, e.g. trailing cables attached to mobile objects, e.g. portable tools, elevators, mining equipment, hoisting cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/045—Flexible cables, conductors, or cords, e.g. trailing cables attached to marine objects, e.g. buoys, diving equipment, aquatic probes, marine towline
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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Abstract
The invention discloses a light variable frequency flexible cable for ships and marine platforms and a manufacturing method thereof, and the light variable frequency flexible cable comprises three main insulated wire cores, a neutral wire core, a shielding layer, an armor layer and an outer sheath, wherein the main insulated wire cores are tile-shaped with the cross sections of 120 degrees, the three main insulated wire cores form a complete annular sleeve which is sleeved on the outer side of the neutral wire core, and the shielding layer, the armor layer and the outer sheath are sequentially sleeved on the outer side of the main insulated wire cores from inside to outside. According to the invention, through the structure that the tile-shaped main insulating wire core surrounds the outer side of the circular neutral wire core, gaps do not exist among the structures, the inner side and the two sides of the tile-shaped main insulating wire core are mutually butted, and the outer side is coated, so that the four directions are completely limited, the structure is stable, the position deviation is not easily caused, and the stable symmetry of the cable can be ensured when the cable is bent and twisted.
Description
Technical Field
The invention relates to a flexible cable and a manufacturing method thereof, in particular to a light variable frequency flexible cable for ships and marine platforms and a manufacturing method thereof, belonging to the field of cable manufacturing.
Background
With the energy-saving development of the ship and marine industries, the variable frequency alternating current transmission is widely applied to the driving of a fan, a winch, a main propeller and a steering oar and various special working conditions. Because the frequency conversion system generates harmonic waves, electromagnetic interference, reflected wave voltage and induced voltage of adjacent cables, the cables are damaged, the service life of the cables is shortened, and the electrical safety performance is influenced. The reliability of marine and maritime equipment is a critical issue, and vibration, moisture and salt can damage the mechanical and electrical components of the marine equipment. In order to ensure trouble-free operation of the ship equipment, system components and materials need to be selected according to special requirements. The cable product for the marine variable frequency propulsion system meets the requirements on the performances of load capacity, shock resistance, acid and alkali resistance, low smoke, zero halogen, oil resistance, low temperature resistance, slurry resistance, flame retardance and the like. Meanwhile, due to the limited space and energy-saving requirement of the ship, the variable frequency cable needs to be small in size and light in weight.
The existing frequency conversion cable mostly adopts a method of splitting a neutral line, the structural symmetry of the cable is realized, the impact of odd-order waves of higher harmonics on the frequency conversion cable is reduced, the structure is a 3+3 core of a circular core, the neutral line in the frequency conversion cable is only used for protecting grounding or passing through three-phase unbalanced current, namely, the neutral line is used as equipotential or used for discharging grounding fault current or used for protecting the effect that a ground wire is not burnt before the action of protection equipment when the grounding fault occurs. The phases of the three neutral wire cores are sequentially lagged by 120 degrees, and a symmetrical and balanced state is formed, so that the current can not be superposed, and the harm of higher harmonics to the variable frequency cable is effectively reduced. However, the cable is dynamic during production and installation because the cable cannot ensure that the product is completely controlled within an absolute theoretical calculation value range due to extrusion, cabling process and the like in the production process. Because the main wire core and the neutral wire of the cable are both circular in the second or fifth type conductors, the twisting of the wire cores has pitches, the bending and twisting of the cable can lead the wire cores to slide back and forth and extrude each other to generate the change of the left and right displacement of the wire cores which are permanently deformed, the stable symmetry of the cable can be changed, the current component generated by the higher harmonic wave can have no phase difference in the neutral wire core, so the current can be superposed into multiple times of the original component, and the neutral wire core can be quickly broken down under the high-frequency pulse.
Disclosure of Invention
The invention aims to solve the technical problem of providing a light variable frequency flexible cable for ships and marine platforms and a manufacturing method thereof, and solving the problem that the positions of cable cores are easy to deviate after the cable is bent and twisted in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a boats and ships and marine platform are with light-duty frequency conversion flexible cable which characterized in that: the cable comprises three main insulated wire cores, a neutral wire core, a shielding layer, an armor layer and an outer sheath, wherein the cross sections of the three main insulated wire cores are in a tile shape of 120 degrees, the three main insulated wire cores form a complete annular sleeve and are arranged on the outer side of the neutral wire core, and the shielding layer, the armor layer and the outer sheath are sequentially arranged on the outer side of the main insulated wire cores from inside to outside.
Furthermore, the main insulated wire core and the neutral wire core respectively comprise a conductor, a semi-conducting layer and a cross-linked polyethylene composite insulating layer, the semi-conducting layer is arranged on the outer side of the conductor, the cross-linked polyethylene composite insulating layer is arranged on the outer side of the semi-conducting layer, the conductor adopts a copper-clad aluminum composite conductor, and the semi-conducting layer adopts a semi-conducting shielding material.
Further, the main insulation core and the neutral core further comprise self-adhesive layers, the self-adhesive layers are arranged on the outer sides of the cross-linked polyethylene composite insulation layers, and self-adhesive rubber is adopted in the self-adhesive layers.
Further, the outside of the self-adhesive layer of the neutral wire core is provided with concave-convex lines, and concave-convex lines are arranged on the tile-shaped lower side inner wall and the side walls on the two sides of the main insulated wire core.
Further, the concave-convex lines are strip-shaped sawtooth lines, strip-shaped wave lines, array triangular pyramid lines or array rectangular pyramid lines, and the concave-convex lines on the mutually contacted planes of the neutral wire core and the main insulated wire core are meshed with each other.
Further, the outside of main insulation core is provided with around the covering, adopts low smoke and zero halogen to separate the inboard that oxygen area wrapped in the outside of main insulation core and was located the shielding layer around the covering.
Furthermore, the shielding layer is formed by wrapping a drainage wire and a copper-plastic composite tape, and the drainage wire is an annealed tin-plated copper soft conductor.
Further, the armor layer is formed by weaving nickel-plated carbon fibers.
Further, the outer sheath is made of low-smoke halogen-free flame-retardant mud-resistant rubber sheath material.
A manufacturing method of a light variable frequency flexible cable for ships and marine platforms is characterized by comprising the following steps:
the method comprises the following steps: drawing and annealing, wherein the copper-clad aluminum alloy wire is produced into a single wire with the diameter of phi 0.080-0.400 mm through a high-precision drawing die made of diamond materials with gradually-changed apertures in a drawing machine, the single wire is annealed and softened at high temperature through an oven at 500-600 ℃, cooled, blown and dried, and wound on a wire coil;
step two: bunching, namely bunching drawn copper-clad aluminum alloy monofilaments into conductor units of 0.5-16 mm, twisting the monofilaments into a bundle by using a high-speed double-twist stranding machine through the rotation of a stranding bow, wherein the ratio of a stranding pitch to a diameter is 8-10 times, the monofilaments are twisted to the left direction, and meanwhile, an active pay-off frame is used for paying off, constant tension control and tension setting are 10-15N;
step three: re-twisting and profiling, namely re-twisting the bundle twisting unit into a conductor of 25 mm-300 mm, arranging the bundle twisting unit according to a 1+6+12+18 normal twisting structure, wherein the twisting pitch ratio is 10-12 times, the twisting direction is consistent with that of the bundle twisting unit, setting tension according to the cross section of the bundle twisting unit and 20N/mm, twisting out a round conductor through a pressing die made of high polycrystalline materials, arranging a profiling device behind the pressing die, pressing the round conductor into a 120-degree tile shape through 1 pair of pressing wheels, and winding the round conductor onto a wire coil through a traction wheel;
step four: extruding the semi-conductive, insulating and self-adhesive layers, extruding and melting the crosslinked polyethylene insulating material by using a high-precision extruder, shaping by using an extrusion die, and then uniformly coating the crosslinked polyethylene insulating material outside a conductor, coating the semi-conductive layer on the front surface of the conductor entering an extruder head, coating the insulating layer on the surface after coating, coating a self-adhesive rubber layer, extruding by using a BM screw rod with the length-diameter ratio of 25, wherein the extrusion temperature is 160-190 ℃, and the conductor is subjected to online high-frequency induction heating before being coated with the insulation;
step five: steam crosslinking, namely placing the produced insulated wire core in a closed steam room, introducing steam into the steam room, automatically controlling a steam pipeline valve through a temperature sensor, adjusting the steam air inflow, keeping the temperature at 90-98 ℃, and setting crosslinking time according to the section size of the insulated wire core;
step six: cabling, namely, placing the main insulated wire core on the outer layer, placing the neutral wire core in the center, adjusting the angle of the main insulated wire core, and combining the insulated wire cores into a round shape through a cabling and doubling die;
step seven: weaving, selecting proper nickel-plated carbon fiber to weave on a high-speed weaving machine according to different cable specifications, wherein the weaving coverage density is more than or equal to 88%;
step eight: the sheath is extruded, utilizes the rubber extruder of high accuracy to extrude melting to the fire-retardant resistant mud rubber sheath material of low smoke and zero halogen and evenly coats in the cable core outside after extrusion tooling stereotypes, vulcanizes the restrictive coating through steam conduit simultaneously, and the molecule of sheath material is converted into network structure by linear structure.
Compared with the prior art, the invention has the following advantages and effects:
1. according to the cable, the tile-shaped main insulating wire core is surrounded on the outer side of the circular neutral wire core, gaps do not exist among the structures, the inner side and the two sides of the tile-shaped main insulating wire core are mutually butted, and the outer side is coated, so that the four directions are completely limited, the structure is stable, the position deviation is not easily caused, and the stable symmetry of the cable can be ensured when the cable is bent and twisted;
2. according to the invention, the electric field is homogenized through the semi-conducting layer, so that point discharge is reduced, and insulation breakdown is effectively avoided; and meanwhile, the self-adhesive rubber layer and the concave-convex lines are adopted, so that the deviation of the main insulated wire core is further avoided.
Drawings
Fig. 1 is a schematic view of a light variable frequency flexible cable for ships and maritime work platforms according to the present invention.
Fig. 2 is a schematic diagram of a neutral core of the light variable frequency flexible cable for ships and marine platforms according to the invention.
Fig. 3 is a schematic diagram of the main insulated wire core of the light variable frequency flexible cable for ships and maritime work platforms according to the invention.
Detailed Description
The present invention is further illustrated by the following examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
As shown in fig. 1, the light frequency conversion flexible cable for ships and marine platforms of the invention comprises three main insulated wire cores 1, a neutral wire core 2, a shielding layer 3, an armor layer 4 and an outer sheath 5, wherein the main insulated wire cores 1 are in a tile shape with a cross section of 120 degrees, the three main insulated wire cores 1 form a complete annular sleeve which is arranged on the outer side of the neutral wire core 2, and the shielding layer 3, the armor layer 4 and the outer sheath 5 are sequentially arranged on the outer side of the main insulated wire cores 1 from inside to outside. Three main insulation sinle silk 1 are 120 tile shapes, and a neutral sinle silk 2 is the center that circular structure distributes at three main insulation sinle silk 1, and main insulation sinle silk 1 makes up into a structure very stable circular with neutral sinle silk 2, has formed a complete symmetry balanced state. Make the cable when crooked and remove, can not produce the removal of sinle silk, the effectual harm that has reduced the higher harmonic to the variable frequency cable. The light variable frequency flexible cable for the ship and the marine platform, which is provided by the invention, adopts a tile-shaped and round combined structure, and has the outstanding characteristics of small outer diameter and stable structure compared with a conventional 3+3 core structure. The tile shape refers to a structure similar to a thick tile shape formed by digging a small fan at the center of a fan, and is similar to the shape of a folding fan sector.
The main insulated wire core 1 and the neutral wire core 2 each comprise a conductor 6, a semiconductive layer 7, and a crosslinked polyethylene composite insulating layer 8, the semiconductive layer 7 being disposed outside the conductor 6, and the crosslinked polyethylene composite insulating layer 8 being disposed outside the semiconductive layer 7. The conductor 6 is a copper-clad aluminum composite conductor, the copper-clad aluminum alloy conductor is formed by drawing a copper strip-clad aluminum alloy rod to enable an interatomic lattice bonding process to be completed, an inner core of the copper-clad aluminum alloy conductor is made of an aluminum alloy material, the volume of the inner core accounts for 85-90%, an outer layer of the copper alloy conductor is made of a copper material, and the volume accounts for 10-15%. The copper-clad aluminum alloy wire is gradually stretched, drawn into the required monofilament diameter, annealed and softened, and subjected to a special stranding process to finish the final conductor. The density of the prepared copper-clad aluminum alloy is 1/3 of pure copper, and on the premise of meeting the electrical performance, the weight of the aluminum alloy wire conductor is reduced by about 20 percent compared with that of a pure copper conductor. The copper-clad aluminum alloy conductor has the characteristics of small density, high strength, high flexibility and high creep resistance. Therefore, compared with the conventional copper material, the cable has the outstanding characteristics of light weight and high flexibility, the cost is saved, and the operation convenience is improved. The semi-conducting layer adopts semi-conducting shielding materials, and the semi-conducting layer is added outside the conductor to homogenize an electric field and reduce point discharge. In the process of processing the conductor, defects (such as burrs) may be generated on the surface, and if no semi-conductive layer exists outside the conductor, an electric field is generated at the defects, so that breakdown and insulation damage are easily generated. If the semi-conducting layer is applied, the electric field on the surface of the conductor is homogenized, and insulation breakdown can be effectively avoided.
The main insulated wire core 1 and the neutral wire core 2 further comprise a self-adhesive layer 9, the self-adhesive layer 9 is arranged on the outer side of the cross-linked polyethylene composite insulating layer 8, and the self-adhesive layer 9 is made of self-adhesive rubber. The outside of the self-adhesive layer of the neutral wire core 2 is provided with concave-convex lines, and concave-convex lines are arranged on the tile-shaped lower side inner wall and the side walls on the two sides of the main insulated wire core 1. The concave-convex lines are strip-shaped sawtooth lines, strip-shaped wave lines, array triangular pyramid lines or array rectangular pyramid lines, and the concave-convex lines on the mutually-contacted planes of the neutral wire core 2 and the main insulated wire core 1 are meshed with each other. Adopts the self-adhesive rubber layer and concave-convex lines, thereby further avoiding the deviation of the main insulated wire core
The outside of main insulation core 1 is provided with around covering 10, adopts low smoke and zero halogen to separate the inboard that oxygen area wrapped in the outside of main insulation core 1 and was located shielding layer 3 around covering 10.
The shielding layer 3 is formed by wrapping a drainage wire and a copper-plastic composite tape, and the drainage wire is an annealed tin-plated copper soft conductor, so that the continuity of the copper-plastic composite tape shielding layer is kept, accumulated charges, short-circuit current and leakage current can be conducted, and the connection with a ground wire is facilitated.
The armor layer 4 is woven from nickel-plated carbon fibers. The density of the nickel-plated carbon fiber is about 2.4g/cm3, the strength of the nickel-plated carbon fiber is far better than that of a tinned copper wire under the same specification, the weaving coverage density is not less than 88%, and the shielding effect is controlled to reach 100%. The shielding layer structure is more stable and reliable, and meanwhile, the whole weight can be reduced by about 15%.
The outer sheath 5 is made of low-smoke halogen-free flame-retardant mud-resistant rubber sheath material. The low temperature tolerance is-40 ℃ and the high temperature tolerance is 125 ℃. The sheath material is prepared by taking EVM rubber as a main raw material, adding a halogen-free flame retardant and other auxiliary agents, and mixing, extruding and granulating; the test piece made of the material is subjected to an enhanced oil resistance test according to NEK TS 606, the change rate of the test tensile strength is less than or equal to +/-30%, and the change rate of the test elongation at break is less than or equal to +/-30%; and (3) carrying out a mud resistance test (calcium bromide solution resistance and EDC 95-11 base oil resistance) according to NEK TS 606, wherein the change rate of the tensile strength is less than or equal to +/-25% and the change rate of the elongation at break is less than or equal to +/-25%. The operation of the cable in the severe environment such as high temperature resistance, oil stain resistance and the like in the variable-frequency propulsion system for a long time is effectively ensured.
A manufacturing method of a light variable frequency flexible cable for ships and marine platforms is characterized by comprising the following steps:
the method comprises the following steps: drawing and annealing, wherein the copper-clad aluminum alloy wire is produced to a single wire with the diameter of phi 0.080-0.400 mm through a high-precision drawing die made of diamond materials with gradually-changed apertures in a drawing machine, specifically, monofilaments with required diameters are produced through the drawing die with gradually-changed apertures in a multi-head drawing machine, and 16 monofilaments can be drawn at one time. Further, high-temperature annealing softening is carried out on the monofilament through an oven at 500-600 ℃, water pipes with the length of 2-3 m are cooled by natural cold water, dried by blowing, and wound on a wire coil.
Step two: bundle twisting, the drawn copper-clad aluminum alloy monofilament bundle twisting is the conductor unit of 0.5 mm-16 mm. Specifically, a high-speed double-twist stranding machine is adopted, monofilaments are stranded into bundles through rotation of a stranding bow, the ratio of the stranding pitch diameter is 8-10 times, the strands are twisted in the left direction, meanwhile, an active pay-off rack is used for paying off, constant tension control is performed, the tension is set to be 10-15N, and good conductor resistance is guaranteed.
Step three: compound twisting and profiling, namely a conductor of which the bundle twisting unit is compound twisted into 25 mm-300 mm. Specifically, a cage winch controlled by stepless speed change hysteresis tension is adopted for complex twisting. The cage stranding machine has a complete back-twisting function, so that the internal stress of the stranded conductor is small. The hysteresis tension has a constant tension control function, and the roundness of the conductor is ensured. The bundle twisting units are arranged according to a 1+6+12+18 normal twisting structure, the twisting pitch ratio is 10-12 times, the twisting direction is consistent with that of the bundle twisting units, the re-twisting structure is more compact, tension is set according to the cross section of the bundle twisting units and according to 20N/mm, and a round conductor is twisted through a pressing die made of high polycrystalline materials. A profiling device is arranged behind the pressing die, and the round conductor is pressed into a 120-degree tile shape by adopting 1 pair of pressing wheels (up-down structure) and wound onto a wire coil through a traction wheel.
Step four: extruding the semi-conductive, insulating and self-adhesive layers, extruding and melting the crosslinked polyethylene insulating material by using a high-precision extruding machine, shaping by using an extruding die, and then uniformly coating the crosslinked polyethylene insulating material outside the conductor, wherein the semi-conductive layer is coated on the front surface of the conductor entering an extruding machine head, the insulating layer is coated on the surface of the conductor after coating, and then the self-adhesive rubber layer is coated on the conductor. Specifically, BM screws with the length-diameter ratio of 25 are adopted for extrusion, and the extrusion temperature is 160-190 ℃. The conductor is subjected to high-frequency induction heating on line before insulation coating, so that the adhesive force between the conductor and the insulating layer is enhanced, and the internal stress of the insulating layer is reduced. In the process of insulating extrusion, a high-precision deviation measuring instrument and a concave-convex instrument are adopted to monitor the insulating thickness, the outer diameter and the surface quality.
Step five: and (3) performing steam crosslinking, namely placing the produced insulated wire core in a closed steam room, introducing steam into the steam room, automatically controlling a steam pipeline valve through a temperature sensor, adjusting the steam air inflow, keeping the temperature at 90-98 ℃, and setting crosslinking time according to the section size of the insulated wire core. Under the action of the cross-linking agent, the molecules of the insulating material are converted from a linear structure to a net structure, the temperature resistance is improved from 70 ℃ to 90 ℃, and the environmental cracking resistance is also greatly improved.
Step six: cabling, the main insulated wire core is placed on the outer layer, the neutral wire core is placed at the center, the angle of the main insulated wire core is adjusted, and the insulated wire cores are combined into a round shape through a cabling doubling die. Specifically, a wire winding machine with two winding machines is adopted for cabling, pre-twisting and stranding are carried out (each main insulating wire core is twisted for 5-8 circles in advance, the wire inlet angle of the main insulating wire core is adjusted, the main insulating wire core cannot turn over in the cabling process), the pitch diameter ratio is 30-35 times, the stranding direction is consistent with that of a conductor, and the conductor in the insulating wire core cannot be loosened. The cable core is wrapped with the halogen-free oxygen-isolating belt, so that the cable core is prevented from loosening, and the flame retardant property of the cable is improved. Dragging a tinned soft copper wire outside the halogen-free oxygen-insulating belt, and wrapping the tinned soft copper wire with a layer of soft copper strip, wherein the wrapping overlapping rate of the copper strip is 15-20%.
Step seven: weaving, selecting proper nickel-plated carbon fiber to weave on a high-speed weaving machine according to different cable specifications, wherein the weaving coverage density is more than or equal to 88%.
Step eight: and (3) extruding the sheath, and extruding and melting the low-smoke halogen-free flame-retardant slurry-resistant rubber sheath material by using a high-precision rubber extruder, and uniformly coating the sheath material outside the cable core after shaping by using an extrusion die. Meanwhile, the sheath layer is vulcanized through a steam pipeline, molecules of the sheath material are converted into a net structure from a linear structure, and the oil resistance and the slurry resistance of the sheath material are improved. The sheath thickness, the outer diameter and the surface quality are monitored by adopting a high-precision deviation measuring instrument and a concave-convex instrument in the sheath extrusion process. And (4) carrying out code spraying and printing on line while extruding the sheath, and carrying out spray printing on information such as the name of a factory, the specification of a model, the rice mark and the like.
According to the cable, the tile-shaped main insulating wire core is surrounded on the outer side of the circular neutral wire core, gaps do not exist among the structures, the inner side and the two sides of the tile-shaped main insulating wire core are mutually butted, and the outer side is coated, so that the four directions are completely limited, the structure is stable, the position deviation is not easily caused, and the stable symmetry of the cable can be ensured when the cable is bent and twisted; according to the invention, the electric field is homogenized through the semi-conducting layer, so that point discharge is reduced, and insulation breakdown is effectively avoided; and meanwhile, the self-adhesive rubber layer and the concave-convex lines are adopted, so that the deviation of the main insulated wire core is further avoided. The cable conductor adopts a copper-clad aluminum alloy scheme, and the ultra-soft conductor made of the copper-clad aluminum alloy composite material is formed by combining copper cladding, drawing, annealing and twisting process technologies, and has the characteristics of high strength, good electric conductivity, light weight and good bending. The armor layer is woven by nickel-plated carbon fibers. The density of the nickel-plated carbon fiber is about 2.4g/cm3, the strength of the nickel-plated carbon fiber is far better than that of a tinned copper wire under the same specification, the weaving coverage density is not less than 88%, and the shielding effect is controlled to reach 100%. The shielding layer structure is more stable and reliable, and meanwhile, the whole weight can be reduced by about 15%. The cable sheath is made of the low-smoke halogen-free flame-retardant oil-resistant slurry-resistant rubber sheath material which is prepared by an autonomous formula in a trial manner, so that the cable sheath has excellent performances of waterproofness, oil resistance, slurry resistance, flame retardance, high and low temperature resistance and the like.
The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The utility model provides a boats and ships and marine platform are with light-duty frequency conversion flexible cable which characterized in that: the cable comprises three main insulated wire cores, a neutral wire core, a shielding layer, an armor layer and an outer sheath, wherein the main insulated wire cores are tile-shaped, the cross sections of the main insulated wire cores are 120 degrees, the three main insulated wire cores form a complete annular sleeve which is sleeved on the outer side of the neutral wire core, and the shielding layer, the armor layer and the outer sheath are sequentially sleeved on the outer side of the main insulated wire cores from inside to outside; the main insulated wire core and the neutral wire core respectively comprise a conductor, a semi-conducting layer and a cross-linked polyethylene composite insulating layer, the semi-conducting layer is arranged on the outer side of the conductor, the cross-linked polyethylene composite insulating layer is arranged on the outer side of the semi-conducting layer, the conductor adopts a copper-clad aluminum composite conductor, and the semi-conducting layer adopts a semi-conducting shielding material; the main insulated wire core and the neutral wire core also comprise self-adhesive layers, the self-adhesive layers are arranged on the outer sides of the crosslinked polyethylene composite insulating layers, and self-adhesive rubber is adopted as the self-adhesive layers; concave-convex lines are arranged on the outer side of the self-adhesive layer of the neutral wire core, and concave-convex lines are arranged on the inner wall of the tile-shaped lower side and the side walls on the two sides of the main insulated wire core; the concave-convex lines are strip-shaped sawtooth lines, strip-shaped wave lines, array triangular pyramid lines or array rectangular pyramid lines, and the concave-convex lines on the planes of the neutral wire core and the main insulated wire core, which are in mutual contact, are meshed with each other.
2. A light-weight frequency conversion flexible cable for ships and maritime work platforms according to claim 1, characterized in that: the outside of main insulation core is provided with around the covering, adopts low smoke and zero halogen to separate the inboard that oxygen area wrapped in the outside of main insulation core and was located the shielding layer around the covering.
3. A light-weight frequency conversion flexible cable for ships and maritime work platforms according to claim 1, characterized in that: the shielding layer is formed by wrapping a drainage wire and a copper-plastic composite tape, and the drainage wire is an annealed tin-plated copper soft conductor.
4. A light-weight frequency conversion flexible cable for ships and maritime work platforms according to claim 1, characterized in that: the armor layer is formed by weaving nickel-plated carbon fibers.
5. A light-weight frequency conversion flexible cable for ships and maritime work platforms according to claim 1, characterized in that: the outer sheath is made of low-smoke halogen-free flame-retardant mud-resistant rubber sheath material.
6. A method for manufacturing a light-weight frequency conversion flexible cable for ships and marine platforms as claimed in any one of claims 1 to 5, comprising the steps of:
the method comprises the following steps: drawing and annealing, wherein the copper-clad aluminum alloy wire is produced into a single wire with the diameter of phi 0.080-0.400 mm through a high-precision drawing die made of diamond materials with gradually-changed apertures in a drawing machine, the single wire is annealed and softened at high temperature through an oven at 500-600 ℃, cooled, blown and dried, and wound on a wire coil;
step two: bunching, namely bunching drawn copper-clad aluminum alloy monofilaments into conductor units of 0.5-16 mm, twisting the monofilaments into a bundle by using a high-speed double-twist stranding machine through the rotation of a stranding bow, wherein the ratio of a stranding pitch to a diameter is 8-10 times, the monofilaments are twisted to the left direction, and meanwhile, an active pay-off frame is used for paying off, constant tension control and tension setting are 10-15N;
step three: re-twisting and profiling, namely re-twisting the bundle twisting unit into a conductor of 25 mm-300 mm, arranging the bundle twisting unit according to a 1+6+12+18 normal twisting structure, wherein the twisting pitch ratio is 10-12 times, the twisting direction is consistent with that of the bundle twisting unit, setting tension according to the cross section of the bundle twisting unit and 20N/mm, twisting out a round conductor through a pressing die made of high polycrystalline materials, arranging a profiling device behind the pressing die, pressing the round conductor into a 120-degree tile shape through 1 pair of pressing wheels, and winding the round conductor onto a wire coil through a traction wheel;
step four: extruding the semi-conductive, insulating and self-adhesive layers, extruding and melting the crosslinked polyethylene insulating material by using a high-precision extruder, shaping by using an extrusion die, and then uniformly coating the crosslinked polyethylene insulating material outside a conductor, coating the semi-conductive layer on the front surface of the conductor entering an extruder head, coating the insulating layer on the surface after coating, coating a self-adhesive rubber layer, extruding by using a BM screw rod with the length-diameter ratio of 25, wherein the extrusion temperature is 160-190 ℃, and the conductor is subjected to online high-frequency induction heating before being coated with the insulation;
step five: steam crosslinking, namely placing the produced insulated wire core in a closed steam room, introducing steam into the steam room, automatically controlling a steam pipeline valve through a temperature sensor, adjusting the steam air inflow, keeping the temperature at 90-98 ℃, and setting crosslinking time according to the section size of the insulated wire core;
step six: cabling, namely, placing the main insulated wire core on the outer layer, placing the neutral wire core in the center, adjusting the angle of the main insulated wire core, and combining the insulated wire cores into a round shape through a cabling and doubling die;
step seven: weaving, selecting proper nickel-plated carbon fiber to weave on a high-speed weaving machine according to different cable specifications, wherein the weaving coverage density is more than or equal to 88%;
step eight: the sheath is extruded, utilizes the rubber extruder of high accuracy to extrude melting to the fire-retardant resistant mud rubber sheath material of low smoke and zero halogen and evenly coats in the cable core outside after extrusion tooling stereotypes, vulcanizes the restrictive coating through steam conduit simultaneously, and the molecule of sheath material is converted into network structure by linear structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911404883.1A CN111029005B (en) | 2019-12-31 | 2019-12-31 | Light variable frequency flexible cable for ship and marine platform and manufacturing method thereof |
| PCT/CN2020/092130 WO2021135051A1 (en) | 2019-12-31 | 2020-05-25 | Lightweight variable frequency flexible cable for ship and marine platform, and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911404883.1A CN111029005B (en) | 2019-12-31 | 2019-12-31 | Light variable frequency flexible cable for ship and marine platform and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN111029005A CN111029005A (en) | 2020-04-17 |
| CN111029005B true CN111029005B (en) | 2021-05-11 |
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| CN201911404883.1A Active CN111029005B (en) | 2019-12-31 | 2019-12-31 | Light variable frequency flexible cable for ship and marine platform and manufacturing method thereof |
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| WO (1) | WO2021135051A1 (en) |
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| CN111029005B (en) * | 2019-12-31 | 2021-05-11 | 中天科技装备电缆有限公司 | Light variable frequency flexible cable for ship and marine platform and manufacturing method thereof |
| CN112164523A (en) * | 2020-09-18 | 2021-01-01 | 双登电缆股份有限公司 | Preparation method of D-type soft aluminum alloy conductor for assembly line |
| CN112992435B (en) * | 2021-01-13 | 2022-12-06 | 江西新吉电缆有限公司 | Power cable for cross-linked polyethylene insulation frequency conversion system |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2613861Y (en) * | 2003-02-13 | 2004-04-28 | 德阳电缆股份有限公司 | Three-core tile-shaped shielding type power cable |
| JP4829764B2 (en) * | 2006-12-07 | 2011-12-07 | タツタ電線株式会社 | Low noise cable |
| CN201607992U (en) * | 2010-03-10 | 2010-10-13 | 安徽宏源特种电缆集团有限公司 | Novel shielded power cable |
| CN204066774U (en) * | 2014-07-30 | 2014-12-31 | 上海飞航电线电缆有限公司 | Five-core cable |
| CN104715840B (en) * | 2015-03-18 | 2016-08-17 | 中天科技装备电缆有限公司 | The maritime platform essential safe type oil resistant fireproof cable of resistance to mud and preparation technology |
| CN207319751U (en) * | 2017-07-08 | 2018-05-04 | 安徽德源电缆集团有限公司 | A kind of ethylene propylene rubber insulated type signal cable of good toughness |
| CN107887071A (en) * | 2017-11-16 | 2018-04-06 | 中天科技装备电缆有限公司 | Ship and maritime platform are with frequency conversion propulsion system composite rope |
| CN208521676U (en) * | 2018-07-26 | 2019-02-19 | 重庆新中环电缆有限公司 | It is a kind of based on the power cable for pressing shoe conductor arrangement |
| CN209149854U (en) * | 2018-10-09 | 2019-07-23 | 安波福电气系统有限公司 | A kind of twisted-pair cable and the unmasked cable using the twisted-pair cable |
| CN111029005B (en) * | 2019-12-31 | 2021-05-11 | 中天科技装备电缆有限公司 | Light variable frequency flexible cable for ship and marine platform and manufacturing method thereof |
| CN211125095U (en) * | 2019-12-31 | 2020-07-28 | 中天科技装备电缆有限公司 | Flexible cable for ship and ocean engineering frequency conversion system |
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| WO2021135051A1 (en) | 2021-07-08 |
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