CN112164505A - Cross-linked polyethylene insulation low-smoke halogen-free flame-retardant power cable - Google Patents
Cross-linked polyethylene insulation low-smoke halogen-free flame-retardant power cable Download PDFInfo
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- CN112164505A CN112164505A CN202011069699.9A CN202011069699A CN112164505A CN 112164505 A CN112164505 A CN 112164505A CN 202011069699 A CN202011069699 A CN 202011069699A CN 112164505 A CN112164505 A CN 112164505A
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/184—Sheaths comprising grooves, ribs or other projections
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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
- H01B7/0045—Cable-harnesses
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/189—Radial force absorbing layers providing a cushioning effect
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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Abstract
The invention discloses a cross-linked polyethylene insulation low-smoke halogen-free flame-retardant power cable, which comprises an outer tegument and a retainer, wherein a plurality of limiting grooves are arranged on the periphery of the retainer, cable cores are arranged in the limiting grooves, an outer insulating layer and an inner insulating layer are coated in the cable, and a high-flame-retardant low-smoke halogen-free insulating material is used, so that the flame resistance of the cable is improved, a large amount of toxic smoke can not be generated under the condition of fire, the damage to a human body is avoided, a rubber tube pressure-resistant layer is additionally arranged between a steel wire armor layer and an inner cushion layer, the damage to the inner structure and the deformation of conductors caused by extrusion in the installation and use processes are reduced, each conductor is separated by arranging the retainer in the center of the cable, the heat transmission among the conductors is reduced, the too fast temperature rise of the cable is avoided, and the strength of the cable is also increased, the safety and the reliability, the service life of the cable is ensured.
Description
Technical Field
The invention relates to a power cable, in particular to a crosslinked polyethylene insulated low-smoke halogen-free flame-retardant power cable.
Background
Along with the frequent occurrence of fire accidents, people continuously deepen the understanding of the fire hazard risk of the electric wire and the electric cable, and the requirements of relevant departments on the performances of fire prevention, flame retardance and the like of the electric wire and the electric cable are higher and higher. The cable fire disaster has the characteristics of fast spread, difficult fire fighting, secondary hazard generation, long recovery time and the like, and can bring huge loss to national economy and the lives and properties of people. Therefore, more severe operating conditions are provided for the flame retardant property, the fireproof property and the safety and reliability of the wires and cables. If the fire-fighting elevator and the fire pump are in fire prevention, explosion prevention, strong overload capacity and long service life, the fire-fighting elevator and the fire pump need to be kept in normal operation for a certain time under the condition of fire, and the cable has special requirements of low smoke, low halogen and low toxicity after combustion, even no smoke, no halogen, no toxicity and the like. The fire-retardant and fire-proof measures of the cable are important means for reducing the fire delay of the cable, and the key point is that the fire-retardant and fire-proof measures are mainly used for preventing fire, and various fire-retardant cables, fire-resistant cables and fire-proof cables are widely applied.
Flame-retardant, the characteristic that when the cable is burned under the prescribed test conditions, after the fire source is removed, the flame spreads on the cable specimen but does not exceed the prescribed range and extinguishes itself. In modern society, people rely on fire and are harmed by fire, so that the fire safety of buildings and materials, including comprehensive wiring systems, is a concern. External fires can damage the integrated wiring system causing transmission interruptions. Meanwhile, the comprehensive wiring system can generate more or less harmful gas and smoke in the flame and can also help the fire to gradually spread to other floors or other rooms. The traditional PVC cable can generate smoke containing toxic gases such as hydrogen chloride, carbon monoxide, carbon dioxide and the like during combustion, which not only influences the smooth operation of disaster relief work, but also causes secondary disasters to lives and properties; the cable can generate poisonous gases such as hydrogen chloride and the like during production, use and combustion by adopting some coating materials which seriously pollute the environment, and the discharged acid gas is extremely high and has great damage to personnel, equipment and instruments.
The rail transportation facilities such as subways, light rails, trams, maglev trains and the like are usually one of the largest infrastructure facilities in cities, and are also the main arteries and urban lifelines of urban passenger transportation. As a public transport means with larger capacity, the safety of the public transport means is directly related to the life safety of the majority of passengers, once the cable is burnt, toxic smoke is generated in the closed space, and the consequence is unreasonable. Therefore, the cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable is provided.
Disclosure of Invention
The invention aims to provide a cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable, wherein an inner insulating layer is coated in the cable, and a high-flame-retardant low-smoke halogen-free insulating material is used, so that the flame resistance of the cable is improved, a large amount of toxic smoke can not be generated under the condition of fire, and the damage to a human body is avoided; the rubber tube pressure-resistant layer is additionally arranged between the steel wire armor layer and the inner cushion layer, the rubber tube pressure-resistant layer can absorb a large amount of pressure, when the rubber tubes are extruded, the rubber tubes which are closely and annularly arranged can deform and are mutually extruded to form a force opposite to the extrusion direction to offset the pressure, the structure of the cable core is protected, the damage to the inner structure and the deformation of a conductor caused by extrusion in the installation and use processes are reduced, the surface damage or the damage to the inner structure of the cable caused by excessive extrusion is avoided, the working performance and the service life of the cable are ensured, and the safety and the reliability of the cable in use are greatly improved; meanwhile, the retainer is arranged at the center of the cable to separate each cable core, so that the occurrence of the cable spontaneous combustion phenomenon is reduced, the power transmission capacity of the cable is improved, the heat transmission among conductors is reduced, the phenomenon that the temperature of the cable rises too fast is avoided, the strength of the cable is increased, the cable core can be protected from being damaged due to excessive bending, the safety factor of the cable in use is greatly improved, and the service life of the cable is prolonged.
The technical problem solved by the invention is as follows:
(1) how to improve the fire resistance of the cable and avoid generating a large amount of toxic smoke under the condition of fire by coating an outer insulating layer and an inner insulating layer in the cable and using a high-flame-retardant low-smoke halogen-free insulating material, thereby solving the problem that personnel and equipment are damaged due to spontaneous combustion of the cable in the rail transit in the prior art;
(2) how to reduce the damage of the internal structure and the deformation of the conductor caused by extrusion in the installation and use processes by additionally arranging a rubber tube pressure-resistant layer between the steel wire armor layer and the inner cushion layer, and solve the problems of the prior art that the cable is damaged after being extruded and potential safety hazards appear;
(3) how to separate every conductor through setting up the holder at the cable center, reduce the heat propagation between the conductor each other, also increased the intensity of cable simultaneously, solved among the prior art cable inner conductor heat influence each other and the cable in the problem of laying the in-process because of excessively buckling and damaging.
The purpose of the invention can be realized by the following technical scheme: a cross-linked polyethylene insulation low-smoke halogen-free flame-retardant power cable comprises an outer tegument and a retainer, wherein a plurality of limiting grooves are formed in the periphery of the retainer, and a ground wire mounting hole is formed in the center of the retainer;
the ground wire mounting holes are internally provided with ground wires, a plurality of limiting grooves are internally provided with cable cores, the outer side of the retainer is provided with a wrapping tape, the wrapping tape is used for binding and fixing the cable cores in the limiting grooves, and a filling layer is arranged between the wrapping tape and the retainer;
the outside in band has waterproof layer, inner cushion layer, rubber tube compressive resistance layer, steel wire armor and tegument from inside to outside cladding in proper order, evenly be provided with a plurality of rubber tube in the rubber tube compressive resistance layer, and the equal tangent setting in the outside of per two adjacent rubber tubes.
The invention has further technical improvements that: the specific number of the limiting grooves formed in the outer side of the retainer is four, the four limiting grooves are arranged around the axis of the retainer at equal angles, and the cross sections of the limiting grooves are of semicircular structures.
The invention has further technical improvements that: the cable core is provided with a conductive core body, an inner shielding layer, an inner insulating layer, a metal shielding layer, an outer insulating layer and a flame-retardant outer sheath in sequence from the inner layer to the outermost layer.
The invention has further technical improvements that: the outer tegument is a high-flame-retardant outer tegument, the steel wire armor layer is a fine steel wire oblique net-shaped woven structure, and the inner cushion layer is a low-smoke halogen-free flame-retardant polyolefin inner cushion layer.
The invention has further technical improvements that: the waterproof layer is a woven belt woven by waterproof yarns consisting of a polyester fabric base layer and expansion particles bonded on the polyester fabric base layer.
The invention has further technical improvements that: the filling layer is made of rock wool, and the retainer is made of silicon rubber.
The invention has further technical improvements that: the flame-retardant outer sheath is a low-smoke halogen-free flame-retardant sheath, and the inner insulating layer and the outer insulating layer are both made of cross-linked polyethylene materials.
The invention has further technical improvements that: the metal shielding layer is a copper strip shielding layer, double layers of copper strip gaps are adopted for wrapping, the surface of the metal shielding layer is tightened by adopting copper wires which are reversely wrapped, the inner shielding layer is made of a semi-conductive shielding material for cables, and the specific model of the semi-conductive shielding material for cables is JB/T10738-2007.
The invention has further technical improvements that: the conductive core is mutually twisted and compressed by three copper wires.
Compared with the prior art, the invention has the beneficial effects that:
1. when the cable is used, workers often cannot notice the problems of excessive bending and extrusion of the cable in the laying process of the cable, but in the case of the cable, the internal structure of the cable is easily damaged, and once the internal structure of the cable is damaged, the phenomenon of electric leakage or spontaneous combustion is easily caused in the power transmission process, so that the damage to equipment and personnel is caused; when the cable is bent, the retainer can deform firstly until the yield strength extreme value is reached, in the whole process, the bending degree of the retainer is maximum, the cable cores can be protected from being damaged due to excessive bending, so that the safety coefficient of the cable in use is greatly improved, the service life of the cable is prolonged, meanwhile, the retainer divides each cable core and limits each cable core, the heat emitted by conductors is prevented from spreading and influencing each other due to direct contact between the cable cores, the spontaneous combustion phenomenon of the cable is reduced, and the power transmission capability of the cable is improved;
2. when the cable is extruded, although each layer structure has certain elasticity and extrusion resistance, but the cable structure can still be damaged by excessive extrusion, and similarly, the cable with the damaged cable structure is easy to have electric leakage or spontaneous combustion in the power transmission process, thereby causing damage to equipment and personnel, greatly reducing the service life of the cable, absorbing a large amount of pressure by the rubber tube pressure resistant layer arranged between the steel wire armor layer and the inner cushion layer, when being extruded, the rubber tubes which are closely and annularly arranged can be deformed and mutually extruded to form a force which is opposite to the extrusion direction to offset the pressure, the structure of the cable core is protected, the surface damage or the internal structure damage of the cable caused by excessive extrusion is avoided, the working performance and the service life of the cable are ensured, and the safety and the reliability of the cable in use are greatly improved;
3. the outer tegument, the inner cushion layer and the flame-retardant outer sheath of the cable core structure are all made of low-smoke halogen-free flame-retardant materials, the inner insulating layer and the outer insulating layer in the cable core structure are made of cross-linked polyethylene materials, the stress resistance of the cable is improved, the cable core structure can be used in a working environment with higher temperature, the current-carrying capacity is larger than that of traditional polyethylene and polyvinyl chloride, the cable core structure is thermosetting, cannot be dissolved after combustion, cannot generate toxic gas, can avoid the condition of a large amount of toxic smoke in a closed space if spontaneous combustion occurs in the use process of the cable, and ensures the life safety of personnel.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of the overall cross-sectional structure of the present invention;
FIG. 2 is a perspective view of the cage of the present invention;
FIG. 3 is a schematic cross-sectional view of the cable core cross-sectional structure of the present invention;
fig. 4 is a perspective view of the cable winding mechanism of the present invention.
In the figure: 1. a tegument layer; 2. a steel wire armor layer; 3. a rubber tube pressure resistant layer; 4. an inner cushion layer; 5. a waterproof layer; 6. wrapping belts; 7. a filling layer; 8. a holder; 9. a ground wire; 10. a cable core; 11. a flame retardant outer jacket; 12. an outer insulating layer; 13. a metal shielding layer; 14. an inner insulating layer; 15. an inner shield layer; 16. a conductive core; 801. a limiting groove; 802. a ground wire mounting hole; 20. a base plate; 21. a support plate; 22. mounting blocks; 23. a fixing plate; 24. rotating a hand wheel; 25. winding the roll; 26. a roller; 27. a connecting shaft; 28. a motor; 29. a supporting seat; 30. a rotating shaft; 31. a driving pulley; 32. a driven pulley; 33. a belt; 34. a protective box; 35. a screw rod; 36. a slider; 37. a servo motor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable includes a jacket layer 1 and a holder 8, wherein the periphery of the holder 8 is provided with a plurality of limiting grooves 801, and the center of the holder 8 is provided with a ground wire mounting hole 802;
the ground wire mounting holes 802 are internally provided with ground wires 9, a plurality of limiting grooves 801 are internally provided with cable cores 10, the outer side of the retainer 8 is provided with a wrapping tape 6, the wrapping tape 6 is used for binding and fixing the cable cores 10 in the limiting grooves 801, and a filling layer 7 is arranged between the wrapping tape 6 and the retainer 8;
the outside of band 6 has waterproof layer 5, inner cushion layer 4, rubber tube compressive layer 3, steel wire armor 2 and tegument 1 from inside to outside cladding in proper order, evenly be provided with a plurality of rubber tube in the rubber tube compressive layer 3, and the equal tangent setting in outside of per two adjacent rubber tubes.
The specific number of the limiting grooves 801 formed in the outer side of the retainer 8 is four, the four limiting grooves 801 are arranged around the axis of the retainer 8 at equal angles, and the cross section of each limiting groove 801 is of a semicircular structure.
The cable core 10 is provided with a conductive core 16, an inner shielding layer 15, an inner insulating layer 14, a metal shielding layer 13, an outer insulating layer 12 and a flame-retardant outer sheath 11 in sequence from the inner layer to the outermost layer.
The outer tegument 1 is a high-flame-retardant outer tegument, the steel wire armor layer 2 is a thin steel wire oblique net-shaped woven structure, and the inner cushion layer 4 is a low-smoke halogen-free flame-retardant polyolefin inner cushion layer.
The waterproof layer 5 is a woven belt woven by water-blocking yarns formed by a polyester fabric base layer and expansion particles bonded on the polyester fabric base layer.
The filling layer 7 is made of rock wool, and the retainer 8 is made of silicon rubber.
The flame-retardant outer sheath 11 is a low-smoke halogen-free flame-retardant sheath, and the inner insulating layer 14 and the outer insulating layer 12 are both made of cross-linked polyethylene materials.
The metal shielding layer 13 is a copper strip shield, double layers of copper strip are wound in a clearance mode, the surface of the metal shielding layer is tightened by reversely wound copper wires, the inner shielding layer 15 is made of a semi-conductive shielding material for cables, and the specific model of the semi-conductive shielding material for cables is JB/T10738-2007.
The conductive core 16 is formed by twisting three copper wires and pressing them.
The winding device of the crosslinked polyethylene insulation low-smoke halogen-free flame-retardant power cable comprises a bottom plate 20, wherein supporting plates 21 are symmetrically fixed on the top of the bottom plate 20, an installation block 22 is fixedly connected to the top of the supporting plate 21, two idler wheels 26 are arranged in parallel on the installation block, the idler wheels 26 are rotatably connected with the installation block 22, a fixing plate 23 is fixedly connected to one side of the supporting plate 21, a rotary hand wheel 24 is arranged on one side of the fixing plate 23, one end of the rotary hand wheel 24 penetrates through the fixing plate 23, and the rotary hand wheel 24 is in threaded engagement with the fixing plate;
a winding drum 25 is arranged right above the bottom plate 20, the winding drum 25 is in rolling connection with rollers 26, one end of a rotary hand wheel 24 is rotatably connected with a bearing, the bearing is arranged in a circular hole of the winding drum 25, the winding drum 25 is in rotating fit with the rotary hand wheel 24 through the bearing, a connecting shaft 27 is arranged between the rollers 26 in the two mounting blocks 25, two ends of the connecting shaft 27 are fixedly connected with the rollers 26, a motor 28 and a supporting seat 29 are arranged at the top of the bottom plate 1, the motor 28 and the supporting seat 29 are both fixedly connected with the bottom plate 1, a rotating shaft 30 is arranged between the motor 28 and the supporting seat 29, one end of the rotating shaft 30 is fixedly connected with the end part of an output shaft of the motor 28 through a coupler, and the other end;
a driving belt wheel 31 is arranged on the outer side of the rotating shaft 30, the driving belt wheel 31 is fixedly connected with the rotating shaft 30, a driven belt wheel 32 is arranged on the outer side of a connecting shaft 27 close to the motor 28, the driven belt wheel 32 is fixedly connected with the connecting shaft 27, a belt 33 is arranged between the driving belt wheel 31 and the driven belt wheel 32, and the driving belt wheel 31 and the driven belt wheel 32 are in transmission fit through the belt 33;
one side of rotation axis 30 is provided with protective housing 34, be provided with lead screw 35 in the protective housing 34, lead screw 35 rotates with protective housing 34 to be connected, protective housing 34 is run through to the one end of lead screw 35, and the one end that lead screw 35 runs through protective housing 34 is provided with servo motor 37, lead screw 35 passes through shaft coupling and servo motor 37's output shaft end fixed connection, protective housing 34's top is provided with slider 36, slider 36 is connected through threaded engagement with lead screw 35, the hole of stepping down the cable has been seted up to slider 36's side.
The working principle is as follows: when the cable is used, firstly, workers often cannot notice the problems of excessive bending and extrusion of the cable in the laying process of the cable, but under the condition, the internal structure of the cable is easily damaged, the retainer 8 can deform firstly when the cable is bent until the yield strength extreme value is reached, and the bending degree of the retainer 8 is maximum in the whole process, so that the cable core 10 can be protected from being damaged due to excessive bending; meanwhile, when the cable is extruded, although each layer of structure has certain elasticity, the cable structure is still damaged due to excessive extrusion, the rubber tube compression resistant layer 3 arranged between the steel wire armor layer 2 and the inner cushion layer 4 can absorb a large amount of pressure, and when the cable is extruded, the rubber tubes which are closely and annularly arranged can deform and extrude with each other to form a force opposite to the extrusion direction to offset the pressure, so that the structure of the cable core 10 is protected; when the winding device of the cross-linked polyethylene insulation low-smoke halogen-free flame-retardant power cable is used, firstly, the cable penetrates through a cable abdicating hole in the sliding block 36, the end part of the cable penetrating through the cable abdicating hole is fixed on the outer side of the winding drum 25, the motor 28 drives the rotating shaft 30 to rotate, so that the driving belt wheel 31 is driven, power transmission is carried out through the belt 33 to drive the driven belt wheel 32 to rotate, so that the connecting shaft 27 is driven to rotate, the connecting shaft 27 drives the roller 26 to rotate, the roller 26 drives the winding drum 25 to roll through the friction force effect, the cable is wound, meanwhile, the servo motor 37 is started, and the forward rotation and the reverse rotation of the servo motor 37 are repeatedly switched, so that the screw rod 35 is repeatedly switched in forward rotation and.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The utility model provides a fire-retardant power cable of cross-linked polyethylene insulation low smoke and zero halogen which characterized in that: the ground wire fixing device comprises an outer tegument layer (1) and a retainer (8), wherein a plurality of limiting grooves (801) are formed in the periphery of the retainer (8), and a ground wire mounting hole (802) is formed in the center of the retainer (8);
a ground wire (9) is arranged in the ground wire mounting hole (802), cable cores (10) are arranged in the limiting grooves (801), a wrapping tape (6) is arranged on the outer side of the retainer (8), the cable cores (10) are bound and fixed in the limiting grooves (801) by the wrapping tape (6), and a filling layer (7) is arranged between the wrapping tape (6) and the retainer (8);
the outside in band (6) has waterproof layer (5), inner cushion layer (4), rubber tube compressive resistance layer (3), steel wire armor (2) and outer tegument (1) from inside to outside cladding in proper order, evenly be provided with a plurality of rubber tube in rubber tube compressive resistance layer (3), and the outside of per two adjacent rubber tubes all tangent setting.
2. The cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable according to claim 1, wherein the number of the limiting grooves (801) formed in the outer side of the holder (8) is four, the four limiting grooves (801) are arranged around the axis of the holder (8) at equal angles, and the cross section of each limiting groove (801) is of a semicircular structure.
3. The cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable according to claim 1, characterized in that the cable core (10) is provided with a conductive core (16), an inner shielding layer (15), an inner insulating layer (14), a metal shielding layer (13), an outer insulating layer (12) and a flame-retardant outer sheath (11) in sequence from the inner layer to the outermost layer.
4. The cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable according to claim 1, characterized in that the outer layer (1) is a high-flame-retardant outer layer, the steel wire armor layer (2) is a fine steel wire oblique net-shaped woven structure, and the inner cushion layer (4) is a low-smoke halogen-free flame-retardant polyolefin inner cushion layer.
5. The insulated low-smoke halogen-free flame-retardant crosslinked polyethylene power cable according to claim 1, wherein the waterproof layer (5) is a woven tape woven from water-blocking yarns consisting of a polyester fabric base layer and expanded particles adhered to the polyester fabric base layer.
6. The cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable according to claim 1, wherein the material of the filling layer (7) is rock wool, and the material of the retainer (8) is silicon rubber.
7. A cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable according to claim 3, wherein the flame-retardant outer sheath (11) is a low-smoke halogen-free flame-retardant sheath, and the inner insulating layer (14) and the outer insulating layer (12) both use cross-linked polyethylene material.
8. The cross-linked polyethylene insulated low-smoke halogen-free flame-retardant power cable according to claim 3, wherein the metal shielding layer (13) is copper tape shielding, double copper tape gap wrapping is adopted, the surface is tightened by adopting copper wires which are reversely wrapped, the inner shielding layer (15) is made of a semi-conductive shielding material for the cable, and the specific model of the semi-conductive shielding material for the cable is JB/T10738-2007.
9. A cross-linked polyethylene insulated low smoke zero halogen flame retardant power cable according to claim 3, characterized in that the conductive core (16) is compacted by three copper wires twisted together.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011069699.9A CN112164505A (en) | 2020-09-30 | 2020-09-30 | Cross-linked polyethylene insulation low-smoke halogen-free flame-retardant power cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011069699.9A CN112164505A (en) | 2020-09-30 | 2020-09-30 | Cross-linked polyethylene insulation low-smoke halogen-free flame-retardant power cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117219328A (en) * | 2023-09-21 | 2023-12-12 | 广东广深电缆有限公司 | Cable with improved cable tension |
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