CN111081418A - High-performance tensile tear-resistant flame-retardant cable and manufacturing method thereof - Google Patents

High-performance tensile tear-resistant flame-retardant cable and manufacturing method thereof Download PDF

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CN111081418A
CN111081418A CN201911336018.8A CN201911336018A CN111081418A CN 111081418 A CN111081418 A CN 111081418A CN 201911336018 A CN201911336018 A CN 201911336018A CN 111081418 A CN111081418 A CN 111081418A
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layer
cable
weaving
conductor
core
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朱志成
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Nantong Pengcheng Cable Co Ltd
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Nantong Pengcheng Cable Co Ltd
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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
    • 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
    • H01B13/02—Stranding-up
    • 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
    • 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
    • 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
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
    • 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
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/08—Several wires or the like stranded in the form of a rope
    • 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
    • H01B7/182—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
    • H01B7/1825—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of a high tensile strength core
    • 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
    • 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

Abstract

The invention provides a high-performance tensile tear-resistant flame-retardant cable and a manufacturing method thereof, and the technical scheme is as follows: including outer jacket, the glass fiber yarn weaving layer that sets gradually from the extroversion inwards, separate the oxygen layer to and be located and separate inside the oxygen layer, at least three conductor assembly that the circumference equidistant set up and set up at least three conductor part between two conductor assemblies respectively, conductor assembly with be halogen-free fire-retardant filling layer between the conductor part. The invention has the beneficial effects that: the cable provided by the invention has the advantages that the structural design is reasonable, the cable can be used under the harsh environment, and the tensile strength, the tear resistance, the insulating property, the flame retardance and the fire resistance are better, so that the cable has good popularization and use values.

Description

High-performance tensile tear-resistant flame-retardant cable and manufacturing method thereof
Technical Field
The invention relates to the technical field of cables, in particular to a high-performance tensile tear-resistant flame-retardant cable and a manufacturing method thereof.
Background
With the development of modern science and technology, the living standard of people's materials has changed greatly, and electric energy has correspondingly been widely developed and utilized. The application of electric energy not only benefits the human society, but also brings the danger of electric shock and electric fire accidents to the human beings. In recent years, with the widespread development and utilization of electric energy, electrical fires, which account for more than 20% of the total number of fires, in rural areas and towns, electrical line fires account for about 60% of the total number of fires, while low-voltage electrical line fires account for more than 90% of the total number of fires. Obviously, there are many problems in the utilization of low-voltage electrical lines, and it is not easy to reduce or even eliminate electrical fire.
From 1992, a large number of commercial houses built in China begin to change wiring modes from open wires to dark wires, and then domestic electric wires and cables are limited by factors such as technology, process and materials, the building life of 70 years, the house property of 70 years and the service life of the electric wires and cables are seriously asynchronous, the electric wires and cables are short-circuited and tripped to leave potential safety hazards if the electric wires and cables are in over-service for a short time, fire is caused by serious ignition and combustion, and the safety problem of the lines becomes a common topic of the times; the development of domestic halogen-free low-smoke flame-retardant heat-resistant fireproof cables starts late, the production technical levels of various manufacturers are different, the technical research and development levels are limited, the requirements of people on tensile strength, tear resistance, fire resistance, flame retardance and environmental protection are higher and higher nowadays, and the flame-retardant fireproof cables produced traditionally cannot meet the requirements of people; therefore, aiming at the phenomenon, for example, patent ZL201220747730.4, which is named as 'halogen-free low-smoke flame-retardant heat-resistant fireproof power cable', adopts the technical scheme that an insulated wire core is formed by a twisted oxygen-free copper conductor, a synthetic mica tape fireproof layer wrapped on the outer layer of the conductor and an irradiation cross-linked polyethylene insulating layer extruded on the fireproof layer, a plurality of insulated wire cores are twisted into a cable core, and a filling layer is arranged in the gap of the cable core; a halogen-free flame-retardant belt wrapping layer is sequentially wrapped outside the cable core in an overlapping manner, a thermoplastic polyolefin inner sheath is extruded outside the cable core, a galvanized steel wire armor layer is wrapped outside the inner sheath in a winding manner, a second wrapping layer is wrapped outside the armor layer in an overlapping manner by adopting a flame-retardant wrapping belt, and a thermoplastic flame-retardant polyolefin outer sheath is extruded on the outermost layer of the cable; 1, the insulating layer of the cable adopts irradiation cross-linked polyethylene, and the irradiation cross-linked polyethylene can not simultaneously meet the requirements of insulation resistance and single vertical combustion of an insulated wire core, and the flame retardance and the insulativity of the cable are insufficient; 2. the inner sheath and the outer sheath of the cable are both extruded thermoplastic halogen-free low-smoke high-flame-retardant polyolefin, and the cable has the advantages that the tensile strength, the tear resistance, the insulativity, the flame retardance and the fire resistance cannot meet the use requirements and the service life is relatively short when the cable is applied to harsh and severe environments. With the rapid development of society, people pay more and more attention to the problems of service life, safety and environmental protection of electric wires and cables for buildings, so that the development of a cable with long service life, environmental protection, tensile strength, tear resistance, high insulation, high flame resistance and high fire resistance is an urgent problem to be solved in the cable industry.
Disclosure of Invention
The invention aims to provide a high-performance tensile, tear-resistant and flame-retardant cable and a manufacturing method thereof, and the device can solve the problems that in the prior art, under the condition that the cable is in a harsh use environment, the tensile, tear-resistant, insulating, flame-retardant and fire-resistant properties of the cable are insufficient, an insulating layer cannot simultaneously meet the requirements of insulation resistance and single vertical combustion of an insulating wire core, and the service life of the cable is short.
The invention is realized by the following measures: the utility model provides a high performance tensile is anti tears flame retarded cable, wherein, includes the outer jacket 1, the glass fiber yarn weaving layer 2 that set gradually from the outside inwards, separates oxygen layer 3, and is located separate inside the oxygen layer 3, at least three conductor assembly 4 that the circumference equidistant set up with set up respectively two at least three conductor part 5 between the conductor assembly 4, conductor assembly 4 with be halogen-free flame retardant filling layer 6 between the conductor part 5.
As a further optimized scheme of the high-performance tensile tear-resistant flame-retardant cable provided by the invention, the conductor component 4 is composed of a cable core 40, a stranded copper core conductor 41 circumferentially arranged on the periphery of the cable core 40, a fire-resistant filling layer 42 positioned between the cable core 40 and the stranded copper core conductor 41, and a cross-linked polyvinyl chloride insulating layer 43 wrapped on the outer side of the fire-resistant filling layer 42, wherein the cable core 40 is sequentially arranged from inside to outside.
As a further optimized scheme of the high-performance tensile, tear-resistant and flame-retardant cable provided by the invention, the conductor part 5 comprises a fluorinated ethylene propylene insulating layer 50, a plurality of twisted tin-plated oxygen-free copper core conductors 51 positioned on the circumference of a concentric circle, a cable core 52 formed by twisting a plurality of twisted tin-plated oxygen-free copper core conductors 51 and a plurality of insulated wire cores, and a high-strength high-temperature-resistant glass fiber rope 53 filled among the fluorinated ethylene propylene insulating layer 50, the twisted tin-plated oxygen-free copper core conductors 51 and the cable core 52 formed by twisting the plurality of insulated wire cores.
As a further optimization scheme of the high-performance tensile, tear-resistant and flame-retardant cable provided by the invention, the high-strength high-temperature-resistant glass fiber rope 53 has the longitudinal tensile strength of more than 7000Mpa, the tensile modulus of more than 100Gpa, the heat conductivity coefficient of more than 0.035 and the rated temperature of-35-550 ℃.
As a further optimization scheme of the high-performance tensile tear-resistant flame-retardant cable provided by the invention, the outer protective layer 1 is a polyvinyl chloride-butyronitrile compound outer protective layer.
As a further optimization scheme of the high-performance tensile tear-resistant flame-retardant cable provided by the invention, the oxygen-insulating layer 3 is a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer.
As a further optimization scheme of the high-performance tensile tear-resistant flame-retardant cable provided by the invention, the rated temperature of the glass fiber yarn braided layer 2 is-68-298 ℃, and the surface of the glass fiber yarn braided layer 2 is coated with a colorless and transparent silicon resin paint film.
In order to better achieve the aim, the invention also provides a manufacturing method of the high-performance tensile tear-resistant flame-retardant cable, which comprises the following steps:
step S1, selecting a polyvinyl chloride-butyronitrile compound outer protective layer 1, a glass fiber yarn woven layer 2 and a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer 3 with proper outer diameters according to the cross section of the cable;
step S2, selecting a high-speed braiding machine according to the cross section of the conductor, doubling the steel wire and the stranded copper core conductor 41, installing a spool on the braiding machine after doubling, replacing a gear, and adjusting the pitch and tension of the braiding machine to braid, wherein when the diameter of a braided single wire is less than 0.15mm, the start-up speed of the braiding machine is controlled to be 70% -80% of the maximum working speed, and when the diameter of the braided single wire is more than 0.15mm, the start-up speed of the braiding machine is controlled to be 50% -65% of the maximum working speed; when the weaving pitch is calculated, the weaving angle is controlled between 45 degrees and 60 degrees, and the weaving density is not lower than 85 percent;
step S3, extruding a cross-linked polyvinyl chloride insulating layer 43, wherein the nominal thickness of the insulation refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, the average thickness is not less than the nominal value, an insulation extrusion die adopts an extrusion type, and the sizes of a die core and a die sleeve during die washing are respectively executed according to the following regulations:
the size of the mold core is as follows: dCore＝Do+ε
Wherein D isoThe external diameter of the wire core before extrusion, and epsilon is the wire passing allowance;
the selection of the threading allowance epsilon accords with the regulation of the following table:
Do(mm) Do＜2.5 2.5≤Do＜8 8≤Do
ε(mm) 0.1～0.25 0.3～0.4 0.45～0.75
the size of the die sleeve is as follows: dSleeve＝Do+2-(0.15～0.35)mm；
Wherein: doThe outer diameter of the wire core before extrusion is shown, and s is the insulation thickness;
the temperature control parameters during the extrusion coating insulation are as follows:
charging section (. degree.C.) Plasticizing section 1 (. degree. C.) Plasticizing section 2 (. degree. C.) Transportation section (. degree.C.) Head (. degree. C.)
25～45 35～55 45～55 45～55 45～55
The steam pressure in the vulcanizing tube and the linear speed of vulcanization during insulation extrusion are controlled as shown in the following table, and the production speed is allowed to be properly adjusted based on the best actual vulcanization effect;
nominal cross-section (mm)2) Steam pressure Mpa Linear speed of vulcanization m/min
0.8 1.0～1.35 35～40
1.0 1.0～1.35 25～35
2.0 1.0～1.35 20～25
3.5 1.0～1.35 15～20
Step S4, selecting a high-speed braiding machine according to the cross section of the stranded tinned oxygen-free copper core conductor 51, performing doubling by adopting the cable core 52 formed by stranding the insulated wire cores and the stranded tinned oxygen-free copper core conductor 51, after the doubling is finished, installing a spool on the braiding machine, adjusting the pitch and the tension of the braiding machine to perform braiding, controlling the starting speed of the braiding machine to be 60% -80% of the maximum working speed when the diameter of a braided single wire is less than 0.1mm, and controlling the starting speed of the braiding machine to be 55% -70% of the maximum working speed when the diameter of the braided single wire is 0.1mm or more; when the weaving pitch is calculated, the weaving angle is controlled to be 30-60 degrees, and the weaving density is not lower than 75 percent;
s5, extruding and wrapping the fluorinated ethylene propylene insulating layer 50, wherein the nominal thickness of the insulating layer refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, and the average thickness is not less than the nominal value:
s6, performing right-hand cabling on each insulated wire core, wherein during cabling, the tension of each wire core is uniformly controlled, the insulated wire cores are arranged according to a natural number sequence from inside to outside, the cabling pitch-diameter ratio is controlled to be between 10 and 12, gaps of cable cores are filled and rounded by adopting a fire-resistant filling layer 42 and/or a high-strength high-temperature-resistant glass fiber rope 53, a cabling mould is selected according to the outer diameter of the cabling, the threading allowance is controlled to be between 0.5 and 1.Omm, a glass fiber yarn braided belt is lapped and wrapped outside the cable cores, the overlapping lapping cover rate is between 20 and 35 percent, and left-hand lapping is adopted during lapping;
s7, extruding the outer layer of the cable core glass fiber yarn braided belt by adopting an extrusion type mould to wrap the polyvinyl chloride-butyronitrile compound outer protective layer, drying the material of the outer protective layer 1 before extrusion, controlling the drying temperature to be between 100 and 120 ℃, controlling the time to be 1-1.5 hours, and controlling the extrusion temperature of the material of the outer protective layer 1 to be between 90 and 120 ℃; the nominal thickness of the outer protective layer 1 is calculated according to the calculation method of GB/T12706.1-2008 national standard, the thinnest point is not less than 75-0. lmm of the nominal value, the average thickness is not less than the nominal value, and the wire outlet speed is controlled to be 15-20 m/min;
step S8, weaving galvanized steel wires on the outer layer of the outer protective layer 1, selecting the number of each strand and the diameter of a single wire according to IEC60092-376:2003 international standard to perform doubling, enabling the tension of the doubled wires to be uniform, welding steel wire joints, mounting a spool on a weaving machine after the doubling, replacing a gear, adjusting the pitch and the tension of the weaving machine to weave, controlling the starting speed of the weaving machine to be 65-75% of the maximum working speed when the diameter of a single weaving wire is less than 0.15mm, and controlling the starting speed of the weaving machine to be 55-60% of the maximum working speed when the diameter of the single weaving wire is 0.15mm or more; when the weaving pitch is calculated, the weaving angle is controlled between 30 ℃ and 45 ℃, and the weaving density is not lower than 95%.
The invention has the beneficial effects that:
(1) the filling layer is formed by filling a fire-resistant filling layer and/or a high-strength high-temperature-resistant glass fiber rope, so that the roundness of the cable is ensured, and a certain flame-retardant effect can be achieved;
(2) the wrapping belt is tightly wrapped by the glass fiber yarn woven belt, and the glass fiber yarn woven belt can be decomposed into metal oxides and separated out crystal water at a certain temperature, so that the effects of adsorbing smoke, settling smoke particles, absorbing heat and blocking the flow of oxygen and combustible gas are achieved, and further the further combustion of the cable is prevented;
(3) the oxygen barrier layer is made of extruded ceramic low-smoke halogen-free polyolefin oxygen barrier materials, so that the ceramic low-smoke halogen-free polyolefin oxygen barrier material has excellent insulating property, flame retardance, fire resistance and good process performance, has high dielectric strength and volume resistivity at normal temperature, can generate uniform micropores on the section of a hard armor body after ablation, obviously increases the dielectric strength and the volume resistivity of the ceramic armor body, has high incrustation speed, is hard and compact to incrustate, can be vertically and automatically extinguished, does not melt or drip under the conditions of flame and no flame, can not cause secondary fire, can be burnt into the hard ceramic armor body, has harder ceramic armor body after being sintered at higher temperature for longer time, has ceramic inorganic matter as residue and more than 90 percent of residue, and can form fine honeycomb micropores in the sintering process to achieve the effects of fire barrier, heat insulation and temperature barrier;
(4) the outer protective layer is a polyvinyl chloride-butyronitrile compound outer protective layer, a pipe extrusion type extrusion process is adopted, the thickness of the protective sleeve layer is uniform, the mechanical strength of the plastic is improved by utilizing the stretchability of the plastic, and the plastic is subjected to orientation action after being stretched, and the extruded outer protective sleeve is subjected to irradiation crosslinking of high-energy electron beams, so that the ageing resistance of the cable is further improved;
(5) the twisted copper core conductor and the twisted tin-plated oxygen-free copper core conductor are adopted as the copper conductor combined structure, so that the tensile strength of the cable is greatly improved, the excellent electrical performance of the cable in the operation process is ensured, and the cable is easy to bend, wind and drag and has long service life.
(6) The cable has reasonable structural design, can meet the use requirement under the harsh environment, and has better tensile strength, tear resistance, insulativity, flame retardance and fire resistance, thereby having good popularization and use values.
Drawings
Fig. 1 is a schematic structural view of the cable of the present invention.
Wherein the reference numerals are: 1. an outer jacket; 2. a glass fiber yarn braid; 3. an oxygen barrier layer; 4. a conductor assembly; 40. a cable core; 41. stranding a copper core conductor; 42. a refractory filler layer; 43. a crosslinked polyvinyl chloride insulating layer; 5. a conductor member; 50. a fluorinated ethylene propylene insulating layer; 51. stranding a tinning oxygen-free copper core conductor; 52. a cable core; 53. high-strength high-temperature-resistant glass fiber ropes; 6. and a halogen-free flame-retardant filling layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1
Referring to fig. 1, the technical scheme provided by the invention is that the high-performance tensile tear-resistant flame-retardant cable comprises an outer protective layer 1, a glass fiber yarn woven layer 2, an oxygen isolation layer 3, three conductor components 4 and three conductor parts 5, wherein the three conductor components 4 are arranged in the oxygen isolation layer 3 from outside to inside in sequence, the three conductor components are arranged at equal intervals on the circumference, the three conductor parts 5 are respectively arranged between the two conductor components 4, and a halogen-free flame-retardant filling layer 6 is arranged between the conductor components 4 and the conductor parts 5.
Specifically, the conductor assembly 4 is composed of a cable core 40, a fire-resistant filling layer 42 and a cross-linked polyvinyl chloride insulation layer 43, wherein the cable core 40 is arranged from inside to outside, the twisted copper core conductor 41 is circumferentially arranged on the periphery of the cable core 40 and is positioned between the cable core 40 and the twisted copper core conductor 41, and the cross-linked polyvinyl chloride insulation layer 43 is wrapped outside the fire-resistant filling layer 42.
Specifically, the conductor part 5 is composed of a fluorinated ethylene propylene insulating layer 50 arranged from outside to inside in sequence, a plurality of stranded tinned oxygen-free copper core conductors 51 arranged on the circumference of a concentric circle, a cable core 52 formed by twisting a plurality of stranded tinned oxygen-free copper core conductors 51, and a high-strength high-temperature-resistant glass fiber rope 53 filled among the fluorinated ethylene propylene insulating layer 50, the plurality of stranded tinned oxygen-free copper core conductors 51 and the cable core 52 formed by twisting a plurality of insulated wire cores.
Specifically, the longitudinal tensile strength of the high-strength high-temperature-resistant glass fiber rope 5 is greater than 7000Mpa, the tensile modulus is greater than 100Gpa, the heat conductivity coefficient is greater than 0.035, and the rated temperature is-35 ℃.
Specifically, the outer sheath 1 is a polyvinyl chloride-butyronitrile composite outer sheath.
Specifically, the oxygen-insulating layer 3 is a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer.
Specifically, the rated temperature of the glass fiber yarn braided layer 2 is-68 ℃, and the surface of the glass fiber yarn braided layer 2 is coated with a colorless and transparent silicon resin paint film.
In order to better achieve the aim, the invention also provides a manufacturing method of the high-performance tensile tear-resistant flame-retardant cable, which comprises the following steps:
step S1, selecting a polyvinyl chloride-butyronitrile compound outer protective layer 1, a glass fiber yarn woven layer 2 and a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer 3 with proper outer diameters according to the cross section of the cable;
step S2, selecting a high-speed braiding machine according to the cross section of the conductor, doubling the steel wire and the stranded copper core conductor 41, installing a spool on the braiding machine after doubling, replacing a gear, and adjusting the pitch and tension of the braiding machine to braid, wherein when the diameter of a braided single wire is less than 0.15mm, the start-up speed of the braiding machine is controlled to be 70% of the maximum working speed, and when the diameter of the braided single wire is 0.15mm or more, the start-up speed of the braiding machine is controlled to be 50% of the maximum working speed; when the weaving pitch is calculated, the weaving angle is controlled to be 45 degrees, and the weaving density is not lower than 85 percent;
step S3, extruding a cross-linked polyvinyl chloride insulating layer 43, wherein the nominal thickness of the insulation refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, the average thickness is not less than the nominal value, an insulation extrusion die adopts an extrusion type, and the sizes of a die core and a die sleeve during die washing are respectively executed according to the following regulations:
the size of the mold core is as follows: dCore＝Do+ε
Wherein D isoThe external diameter of the wire core before extrusion, and epsilon is the wire passing allowance;
the selection of the threading allowance epsilon accords with the regulation of the following table:
Do(mm) Do＜2.5 2.5≤Do＜8 8≤Do
ε(mm) 0.1～0.25 0.3～0.4 0.45～0.75
the size of the die sleeve is as follows: dSleeve＝Do+2-(0.15～0.35)mm；
Wherein: doThe outer diameter of the wire core before extrusion is shown, and s is the insulation thickness;
the temperature control parameters during the extrusion coating insulation are as follows:
charging section (. degree.C.) Plasticizing section 1 (. degree. C.) Plasticizing section 2 (. degree. C.) Transportation section (. degree.C.) Head (. degree. C.)
25～45 35～55 45～55 45～55 45～55
The steam pressure in the vulcanizing tube and the linear speed of vulcanization during insulation extrusion are controlled as shown in the following table, and the production speed is allowed to be properly adjusted based on the best actual vulcanization effect;
nominal cross-section (mm)2) Steam pressure Mpa Linear speed of vulcanization m/min
0.8 1.0～1.35 35～40
1.0 1.0～1.35 25～35
2.0 1.0～1.35 20～25
3.5 1.0～1.35 15～20
Step S4, selecting a high-speed braiding machine according to the cross section of the stranded tinned oxygen-free copper core conductor 51, performing doubling by adopting the cable core 52 formed by stranding the insulated wire cores and the stranded tinned oxygen-free copper core conductor 51, after the doubling is finished, installing a spool on the braiding machine, and adjusting the pitch and the tension of the braiding machine to perform braiding, wherein when the diameter of a braided single wire is less than 0.1mm, the starting speed of the braiding machine is controlled to be 60% of the maximum working speed, and when the diameter of the braided single wire is 0.1mm or more, the starting speed of the braiding machine is controlled to be 55% -70% of the maximum working; when the weaving pitch is calculated, the weaving angle is controlled to be 30 degrees, and the weaving density is not lower than 75 percent;
s5, extruding and wrapping the fluorinated ethylene propylene insulating layer 50, wherein the nominal thickness of the insulating layer refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, and the average thickness is not less than the nominal value:
s6, performing right-hand cabling on each insulated wire core, wherein during cabling, the tension of each wire core is uniformly controlled, the insulated wire cores are arranged according to a natural number sequence from inside to outside, the cabling pitch-diameter ratio is controlled to be between 10, gaps of cable cores are filled and rounded by adopting a fire-resistant filling layer 42 and/or a high-strength high-temperature-resistant glass fiber rope 53, a cabling mould is selected according to the outer diameter of the cabling, the threading allowance is controlled to be between 0.5mm, a lapping glass fiber yarn woven belt is overlapped outside the cable cores, the lapping and covering rate of the overlapping lapping is between 20%, and left-hand lapping is adopted during lapping;
s7, extruding the outer layer of the cable core glass fiber yarn braided belt by adopting an extrusion type mould to wrap the outer protection layer of the polyvinyl chloride-butyronitrile compound, drying the material of the outer protection layer 1 before extrusion, controlling the drying temperature to be between 100 ℃, controlling the time to be 1 hour, and controlling the extrusion temperature of the material of the outer protection layer 1 to be between 90 ℃; the nominal thickness of the outer protective layer 1 is calculated according to the calculation method of GB/T12706.1-2008 national standard, the thinnest point is not less than 75-0. lmm of the nominal value, the average thickness is not less than the nominal value, and the wire outlet speed is controlled at 15 m/min;
step S8, weaving galvanized steel wires on the outer layer of the outer protective layer 1, selecting the number of each strand and the diameter of a single wire according to IEC60092-376:2003 international standard to perform doubling, enabling the tension of the doubled wires to be uniform, welding steel wire joints, mounting a spool on a weaving machine after the doubling, replacing a gear, adjusting the pitch and the tension of the weaving machine to weave, controlling the starting speed of the weaving machine to be 65% of the maximum working speed when the diameter of a single weaving wire is less than 0.15mm, and controlling the starting speed of the weaving machine to be 55% of the maximum working speed when the diameter of the single weaving wire is 0.15mm or more; when the weaving pitch is calculated, the weaving angle is controlled to be 30 ℃, and the weaving density is not lower than 95%.
Example 2
Referring to fig. 1, the technical scheme provided by the invention is that the high-performance tensile tear-resistant flame-retardant cable comprises an outer protective layer 1, a glass fiber yarn woven layer 2, an oxygen isolation layer 3, three conductor components 4 and three conductor parts 5, wherein the three conductor components 4 are arranged in the oxygen isolation layer 3 from outside to inside in sequence, the three conductor components are arranged at equal intervals on the circumference, the three conductor parts 5 are respectively arranged between the two conductor components 4, and a halogen-free flame-retardant filling layer 6 is arranged between the conductor components 4 and the conductor parts 5.
Specifically, the conductor assembly 4 is composed of a cable core 40, a fire-resistant filling layer 42 and a cross-linked polyvinyl chloride insulation layer 43, wherein the cable core 40 is arranged from inside to outside, the twisted copper core conductor 41 is circumferentially arranged on the periphery of the cable core 40 and is positioned between the cable core 40 and the twisted copper core conductor 41, and the cross-linked polyvinyl chloride insulation layer 43 is wrapped outside the fire-resistant filling layer 42.
Specifically, the conductor part 5 is composed of a fluorinated ethylene propylene insulating layer 50 arranged from outside to inside in sequence, a plurality of stranded tinned oxygen-free copper core conductors 51 arranged on the circumference of a concentric circle, a cable core 52 formed by twisting a plurality of stranded tinned oxygen-free copper core conductors 51, and a high-strength high-temperature-resistant glass fiber rope 53 filled among the fluorinated ethylene propylene insulating layer 50, the plurality of stranded tinned oxygen-free copper core conductors 51 and the cable core 52 formed by twisting a plurality of insulated wire cores.
Specifically, the longitudinal tensile strength of the high-strength high-temperature-resistant glass fiber rope 5 is greater than 7000Mpa, the tensile modulus is greater than 100Gpa, the heat conductivity coefficient is greater than 0.035, and the rated temperature is 350 ℃.
Specifically, the outer sheath 1 is a polyvinyl chloride-butyronitrile composite outer sheath.
Specifically, the oxygen-insulating layer 3 is a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer.
Specifically, the glass fiber yarn braided layer 2 is rated at 155 ℃, and the surface of the glass fiber yarn braided layer 2 is coated with a colorless and transparent silicon resin paint film.
In order to better achieve the aim, the invention also provides a manufacturing method of the high-performance tensile tear-resistant flame-retardant cable, which comprises the following steps:
step S1, selecting a polyvinyl chloride-butyronitrile compound outer protective layer 1, a glass fiber yarn woven layer 2 and a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer 3 with proper outer diameters according to the cross section of the cable;
step S2, selecting a high-speed braiding machine according to the cross section of the conductor, doubling the steel wire and the stranded copper core conductor 41, installing a spool on the braiding machine after doubling, replacing a gear, and adjusting the pitch and tension of the braiding machine to braid, wherein when the diameter of a braided single wire is less than 0.15mm, the start-up speed of the braiding machine is controlled to be 75% of the maximum working speed, and when the diameter of the braided single wire is 0.15mm or more, the start-up speed of the braiding machine is controlled to be 55% of the maximum working speed; when the weaving pitch is calculated, the weaving angle is controlled to be 50 degrees, and the weaving density is not lower than 85 percent;
step S3, extruding a cross-linked polyvinyl chloride insulating layer 43, wherein the nominal thickness of the insulation refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, the average thickness is not less than the nominal value, an insulation extrusion die adopts an extrusion type, and the sizes of a die core and a die sleeve during die washing are respectively executed according to the following regulations:
the size of the mold core is as follows: dCore＝Do+ε
Wherein D isoThe external diameter of the wire core before extrusion, and epsilon is the wire passing allowance;
the selection of the threading allowance epsilon accords with the regulation of the following table:
Do(mm) Do＜2.5 2.5≤Do＜8 8≤Do
ε(mm) 0.1～0.25 0.3～0.4 0.45～0.75
the size of the die sleeve is as follows: dSleeve＝Do+2-(0.15～0.35)mm；
Wherein: doThe outer diameter of the wire core before extrusion is shown, and s is the insulation thickness;
the temperature control parameters during the extrusion coating insulation are as follows:
charging section (. degree.C.) Plasticizing section 1 (. degree. C.) Plasticizing section 2 (. degree. C.) Transportation section (. degree.C.) Head (. degree. C.)
25～45 35～55 45～55 45～55 45～55
The steam pressure in the vulcanizing tube and the linear speed of vulcanization during insulation extrusion are controlled as shown in the following table, and the production speed is allowed to be properly adjusted based on the best actual vulcanization effect;
Figure BDA0002330931470000091
Figure BDA0002330931470000101
step S4, selecting a high-speed braiding machine according to the cross section of the stranded tinned oxygen-free copper core conductor 51, performing doubling by adopting the cable core 52 formed by stranding the insulated wire cores and the stranded tinned oxygen-free copper core conductor 51, after the doubling is finished, installing a spool on the braiding machine, adjusting the pitch and the tension of the braiding machine to perform braiding, controlling the starting speed of the braiding machine to be 70% of the maximum working speed when the diameter of a braided single wire is less than 0.1mm, and controlling the starting speed of the braiding machine to be 65% of the maximum working speed when the diameter of the braided single wire is 0.1mm or more; when the weaving pitch is calculated, the weaving angle is controlled to be 45 degrees, and the weaving density is not lower than 75 percent;
s5, extruding and wrapping the fluorinated ethylene propylene insulating layer 50, wherein the nominal thickness of the insulating layer refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, and the average thickness is not less than the nominal value:
s6, performing right-hand cabling on each insulated wire core, wherein during cabling, the tension of each wire core is uniformly controlled, the insulated wire cores are arranged according to a natural number sequence from inside to outside, the cabling pitch-diameter ratio is controlled to be between 11, the gaps of cable cores are filled and rounded by adopting a fire-resistant filling layer 42 and/or a high-strength high-temperature-resistant glass fiber rope 53, a cabling mould is selected according to the outer diameter of the cabling, the threading allowance is controlled to be between 0.7mm, a lapping glass fiber yarn woven belt is overlapped outside the cable cores, the lapping and covering rate of the overlapping lapping is between 25%, and left-hand lapping is adopted during lapping;
s7, extruding the outer layer of the cable core glass fiber yarn braided belt by adopting an extrusion type mould to wrap the outer protection layer of the polyvinyl chloride-butyronitrile compound, drying the material of the outer protection layer 1 before extrusion, controlling the drying temperature to be 110 ℃, controlling the time to be 1.2 hours, and controlling the extrusion temperature of the material of the outer protection layer 1 to be 110 ℃; the nominal thickness of the outer protective layer 1 is calculated according to the calculation method of GB/T12706.1-2008 national standard, the thinnest point is not less than 75-0. lmm of the nominal value, the average thickness is not less than the nominal value, and the wire outlet speed is controlled at 17 m/min;
step S8, weaving galvanized steel wires on the outer layer of the outer protective layer 1, selecting the number of each strand and the diameter of a single wire according to IEC60092-376:2003 international standard to perform doubling, enabling the tension of the doubled wires to be uniform, welding steel wire joints, mounting a spool on a weaving machine after the doubling, replacing a gear, adjusting the pitch and the tension of the weaving machine to weave, controlling the starting speed of the weaving machine to be 70% of the maximum working speed when the diameter of a single weaving wire is less than 0.15mm, and controlling the starting speed of the weaving machine to be 58% of the maximum working speed when the diameter of the single weaving wire is 0.15mm or more; when the weaving pitch is calculated, the weaving angle is controlled to be 35 ℃, and the weaving density is not lower than 95%.
Example 3
Referring to fig. 1, the technical scheme provided by the invention is that the high-performance tensile tear-resistant flame-retardant cable comprises an outer protective layer 1, a glass fiber yarn woven layer 2, an oxygen isolation layer 3, three conductor components 4 and three conductor parts 5, wherein the three conductor components 4 are arranged in the oxygen isolation layer 3 from outside to inside in sequence, the three conductor components are arranged at equal intervals on the circumference, the three conductor parts 5 are respectively arranged between the two conductor components 4, and a halogen-free flame-retardant filling layer 6 is arranged between the conductor components 4 and the conductor parts 5.
Specifically, the conductor assembly 4 is composed of a cable core 40, a fire-resistant filling layer 42 and a cross-linked polyvinyl chloride insulation layer 43, wherein the cable core 40 is arranged from inside to outside, the twisted copper core conductor 41 is circumferentially arranged on the periphery of the cable core 40 and is positioned between the cable core 40 and the twisted copper core conductor 41, and the cross-linked polyvinyl chloride insulation layer 43 is wrapped outside the fire-resistant filling layer 42.
Specifically, the conductor part 5 is composed of a fluorinated ethylene propylene insulating layer 50 arranged from outside to inside in sequence, a plurality of stranded tinned oxygen-free copper core conductors 51 arranged on the circumference of a concentric circle, a cable core 52 formed by twisting a plurality of stranded tinned oxygen-free copper core conductors 51, and a high-strength high-temperature-resistant glass fiber rope 53 filled among the fluorinated ethylene propylene insulating layer 50, the plurality of stranded tinned oxygen-free copper core conductors 51 and the cable core 52 formed by twisting a plurality of insulated wire cores.
Specifically, the longitudinal tensile strength of the high-strength high-temperature-resistant glass fiber rope 5 is greater than 7000Mpa, the tensile modulus is greater than 100Gpa, the heat conductivity coefficient is greater than 0.035, and the rated temperature is 550 ℃.
Specifically, the outer sheath 1 is a polyvinyl chloride-butyronitrile composite outer sheath.
Specifically, the oxygen-insulating layer 3 is a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer.
Specifically, the glass fiber yarn braided layer 2 is rated at 298 ℃, and the surface of the glass fiber yarn braided layer 2 is coated with a colorless and transparent silicon resin paint film.
In order to better achieve the aim, the invention also provides a manufacturing method of the high-performance tensile tear-resistant flame-retardant cable, which comprises the following steps:
step S1, selecting a polyvinyl chloride-butyronitrile compound outer protective layer 1, a glass fiber yarn woven layer 2 and a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer 3 with proper outer diameters according to the cross section of the cable;
step S2, selecting a high-speed braiding machine according to the cross section of the conductor, doubling the steel wire and the stranded copper core conductor 41, installing a spool on the braiding machine after doubling, replacing a gear, and adjusting the pitch and tension of the braiding machine to braid, wherein when the diameter of a braided single wire is less than 0.15mm, the start-up speed of the braiding machine is controlled to be 80% of the maximum working speed, and when the diameter of the braided single wire is 0.15mm or more, the start-up speed of the braiding machine is controlled to be 65% of the maximum working speed; when the weaving pitch is calculated, the weaving angle is controlled to be 60 degrees, and the weaving density is not lower than 85 percent;
step S3, extruding a cross-linked polyvinyl chloride insulating layer 43, wherein the nominal thickness of the insulation refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, the average thickness is not less than the nominal value, an insulation extrusion die adopts an extrusion type, and the sizes of a die core and a die sleeve during die washing are respectively executed according to the following regulations:
the size of the mold core is as follows: dCore＝Do+ε
Wherein D isoThe external diameter of the wire core before extrusion, and epsilon is the wire passing allowance;
the selection of the threading allowance epsilon accords with the regulation of the following table:
Do(mm) Do＜2.5 2.5≤Do＜8 8≤Do
ε(mm) 0.1～0.25 0.3～0.4 0.45～0.75
the size of the die sleeve is as follows: dSleeve＝Do+2-(0.15～0.35)mm；
Wherein: doThe outer diameter of the wire core before extrusion is shown, and s is the insulation thickness;
the temperature control parameters during the extrusion coating insulation are as follows:
charging section (. degree.C.) Plasticizing section 1 (. degree. C.) Plasticizing section 2 (. degree. C.) Transportation section (. degree.C.) Head (. degree. C.)
25～45 35～55 45～55 45～55 45～55
The steam pressure in the vulcanizing tube and the linear speed of vulcanization during insulation extrusion are controlled as shown in the following table, and the production speed is allowed to be properly adjusted based on the best actual vulcanization effect;
nominal cross-section (mm)2) Steam pressure Mpa Linear speed of vulcanization m/min
0.8 1.0～1.35 35～40
1.0 1.0～1.35 25～35
2.0 1.0～1.35 20～25
3.5 1.0～1.35 15～20
Step S4, selecting a high-speed braiding machine according to the cross section of the stranded tinned oxygen-free copper core conductor 51, performing doubling by adopting the cable core 52 formed by stranding the insulated wire cores and the stranded tinned oxygen-free copper core conductor 51, after the doubling is finished, installing a spool on the braiding machine, adjusting the pitch and the tension of the braiding machine to perform braiding, controlling the starting speed of the braiding machine to be 80% of the maximum working speed when the diameter of a braided single wire is less than 0.1mm, and controlling the starting speed of the braiding machine to be 70% of the maximum working speed when the diameter of the braided single wire is 0.1mm or more; when the weaving pitch is calculated, the weaving angle is controlled to be 60 degrees, and the weaving density is not lower than 75 percent;
s5, extruding and wrapping the fluorinated ethylene propylene insulating layer 50, wherein the nominal thickness of the insulating layer refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, and the average thickness is not less than the nominal value:
s6, performing right-hand cabling on each insulated wire core, wherein during cabling, the tension of each wire core is uniformly controlled, the insulated wire cores are arranged according to a natural number sequence from inside to outside, the cabling pitch-diameter ratio is controlled to be between 12, the gap of a cable core is filled and rounded by a fire-resistant filling layer 42 and/or a high-strength high-temperature-resistant glass fiber rope 53, a cabling mould is selected according to the outer diameter of the cabling, the threading allowance is controlled to be between 1 and Omm, a lapping glass fiber yarn weaving belt is overlapped outside the cable core, the overlapping lapping cover ratio is between 20 and 35 percent, and left-hand lapping is adopted during lapping;
s7, extruding the outer layer of the cable core glass fiber yarn braided belt by adopting an extrusion type mould to wrap the outer protection layer of the polyvinyl chloride-butyronitrile compound, drying the material of the outer protection layer 1 before extrusion, controlling the drying temperature to be 120 ℃, controlling the time to be 1.5 hours, and controlling the extrusion temperature of the material of the outer protection layer 1 to be 120 ℃; the nominal thickness of the outer protective layer 1 is calculated according to the calculation method of GB/T12706.1-2008 national standard, the thinnest point is not less than 75-0. lmm of the nominal value, the average thickness is not less than the nominal value, and the wire outlet speed is controlled at 20 m/min;
step S8, weaving galvanized steel wires on the outer layer of the outer protective layer 1, selecting the number of each strand and the diameter of a single wire according to IEC60092-376:2003 international standard to perform doubling, enabling the tension of the doubled wires to be uniform, welding steel wire joints, mounting a spool on a weaving machine after the doubling, replacing a gear, adjusting the pitch and the tension of the weaving machine to weave, controlling the starting speed of the weaving machine to be 75% of the maximum working speed when the diameter of a single weaving wire is less than 0.15mm, and controlling the starting speed of the weaving machine to be 60% of the maximum working speed when the diameter of the single weaving wire is 0.15mm or more; when the weaving pitch is calculated, the weaving angle is controlled to be 45 ℃, and the weaving density is not lower than 95%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. The utility model provides a high performance tensile is anti to tear flame retarded cable, its characterized in that includes outer jacket (1), glass fiber yarn weaving layer (2), the oxygen layer (3) that set gradually from outside to inside, and is located inside the oxygen layer (3) that separates, at least three conductor assembly (4) that the circumference equidistant set up with set up respectively two at least three conductor part (5) between conductor assembly (4), conductor assembly (4) with be halogen-free flame retardant filling layer (6) between conductor part (5).
2. The high-performance tensile tear-resistant flame-retardant cable according to claim 1, wherein the conductor assembly (4) comprises a cable core (40) arranged from inside to outside, a fire-resistant filling layer (42) with a twisted copper core conductor (41) circumferentially arranged on the periphery of the cable core (40) and between the cable core (40) and the twisted copper core conductor (41), and a cross-linked polyvinyl chloride insulating layer (43) wrapped outside the fire-resistant filling layer (42).
3. The high-performance tensile, tear-resistant and flame-retardant cable according to claim 1, wherein the conductor member (5) is composed of a perfluorinated ethylene propylene insulating layer (50) sequentially arranged from outside to inside, a plurality of stranded tinned oxygen-free copper core conductors (51) arranged on the circumference of a concentric circle, a plurality of stranded tinned oxygen-free copper core conductors (51) surrounded by the stranded tinned oxygen-free copper core conductors (51), a plurality of cable cores (52) stranded by insulation cores, and a high-strength high-temperature-resistant glass fiber rope (53) filled between the perfluorinated ethylene propylene insulating layer (50), the stranded tinned oxygen-free copper core conductors (51) and the cable cores (52) stranded by the insulation cores.
4. The high-performance tensile, tear-resistant and flame-retardant cable as claimed in claim 3, wherein the high-strength high-temperature-resistant glass fiber rope (53) has a longitudinal tensile strength of more than 7000MPa, a tensile modulus of more than 100Gpa, a thermal conductivity of more than 0.035, and a rated temperature of-35-550 ℃.
5. The high performance tensile, tear resistant and flame retardant cable according to claim 3 wherein the outer jacket (1) is a polyvinyl chloride-nitrile compound outer jacket.
6. The high-performance tensile tear-resistant flame-retardant cable according to claim 1, wherein the oxygen barrier layer (3) is a ceramic low-smoke halogen-free polyolefin oxygen barrier layer.
7. The high-performance tensile, tear-resistant and flame-retardant cable according to any one of claims 1 to 6, wherein the rated temperature of the woven glass fiber yarn layer (2) is-68 ℃ to 298 ℃, and the surface of the woven glass fiber yarn layer (2) is coated with a colorless and transparent silicone paint film.
8. The manufacturing method of the high-performance tensile, tear-resistant and flame-retardant cable based on any one of claims 1 to 7 is characterized by comprising the following steps:
step S1, selecting a polyvinyl chloride-butyronitrile compound outer protective layer 1, a glass fiber yarn woven layer (2) and a ceramic low-smoke halogen-free polyolefin oxygen-insulating layer (3) with proper outer diameter according to the cross section of the cable;
step S2, selecting a high-speed braiding machine according to the cross section of the conductor, doubling the steel wire and the stranded copper core conductor (41), installing a spool on the braiding machine after the doubling is finished, replacing a gear, and adjusting the pitch and the tension of the braiding machine to braid, wherein when the diameter of a braided single wire is less than 0.15mm, the start-up speed of the braiding machine is controlled to be 70% -80% of the maximum working speed, and when the diameter of the braided single wire is more than 0.15mm, the start-up speed of the braiding machine is controlled to be 50% -65% of the maximum working speed; when the weaving pitch is calculated, the weaving angle is controlled between 45 degrees and 60 degrees, and the weaving density is not lower than 85 percent;
s3, extruding a cross-linked polyvinyl chloride insulating layer (43), wherein the nominal thickness of the insulation refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, the average thickness is not less than the nominal value, an insulation extrusion die adopts an extrusion type, and the sizes of a die core and a die sleeve during die washing are respectively executed according to the following regulations:
the size of the mold core is as follows: dCore＝Do+ε
Wherein D isoThe external diameter of the wire core before extrusion, and epsilon is the wire passing allowance;
the selection of the threading allowance epsilon accords with the regulation of the following table:
Do(mm) Do＜2.5 2.5≤Do＜8 8≤Do ε(mm) 0.1～0.25 0.3～0.4 0.45～0.75
the size of the die sleeve is as follows: dSleeve＝Do+2-(0.15～0.35)mm；
Wherein: doThe outer diameter of the wire core before extrusion is shown, and s is the insulation thickness;
the temperature control parameters during the extrusion coating insulation are as follows:
charging section (. degree.C.) Plasticizing section 1 (. degree. C.) Plasticizing section 2 (. degree. C.) Transportation section (. degree.C.) Head (. degree. C.) 25～45 35～55 45～55 45～55 45～55
The steam pressure in the vulcanizing tube and the linear speed of vulcanization during insulation extrusion are controlled as shown in the following table, and the production speed is allowed to be properly adjusted based on the best actual vulcanization effect;
nominal cross-section (mm)2) Steam pressure Mpa Linear speed of vulcanization m/min 0.8 1.0～1.35 35～40 1.0 1.0～1.35 25～35 2.0 1.0～1.35 20～25 3.5 1.0～1.35 15～20
Step S4, selecting a high-speed braiding machine according to the cross section of the stranded tinned oxygen-free copper core conductor (51), doubling the cable core (52) formed by stranding the insulated wire cores and the stranded tinned oxygen-free copper core conductor (51), after the doubling is finished, installing a spool on the braiding machine, adjusting the pitch and the tension of the braiding machine to perform braiding, controlling the starting speed of the braiding machine to be 60% -80% of the maximum working speed when the diameter of a braided single wire is less than 0.1mm, and controlling the starting speed of the braiding machine to be 55% -70% of the maximum working speed when the diameter of the braided single wire is 0.1mm or more; when the weaving pitch is calculated, the weaving angle is controlled to be 30-60 degrees, and the weaving density is not lower than 75 percent;
s5, extruding and wrapping a fluorinated ethylene propylene insulating layer (50), wherein the nominal thickness of the insulating layer refers to relevant regulations of GB/T12706.1-2008 national standard, the thinnest point is not less than 90-0.15 mm of the nominal value, and the average thickness is not less than the nominal value:
s6, performing right-hand cabling on each insulated wire core, wherein during cabling, the tension of each wire core is uniformly controlled, the insulated wire cores are arranged according to a natural number sequence from inside to outside, the cabling pitch-diameter ratio is controlled to be between 10 and 12, gaps of cable cores are filled and rounded by adopting a fire-resistant filling layer (42) and/or a high-strength high-temperature-resistant glass fiber rope (53), a cabling mould is selected according to the outer diameter of the cabling, the threading allowance is controlled to be between 0.5 and 1.Omm, a lapping glass fiber yarn woven belt is overlapped outside the cable cores, the lapping rate of overlapping lapping is between 20 and 35 percent, and left-hand lapping is adopted during lapping;
s7, extruding the outer layer of the cable core glass fiber yarn braided belt by adopting an extrusion type mould to wrap the polyvinyl chloride-butyronitrile compound outer protective layer, drying the outer protective layer (1) before extrusion, controlling the drying temperature to be between 100 and 120 ℃, controlling the time to be 1 to 1.5 hours, and controlling the extrusion temperature of the outer protective layer (1) to be between 90 and 120 ℃; the nominal thickness of the outer protective layer (1) is calculated according to the calculation method of GB/T12706.1-2008 national standard, the thinnest point is not less than 75-0. lmm of the nominal value, the average thickness is not less than the nominal value, and the outgoing line speed is controlled to be 15-20 m/min;
step S8, weaving galvanized steel wires on the outer layer of the outer protective layer (1), selecting the number of each strand and the diameter of each monofilament according to IEC60092-376:2003 international standard to perform doubling, enabling the tension to be uniform, welding steel wire joints, mounting a spool on a weaving machine after the doubling, replacing a gear, adjusting the pitch and the tension of the weaving machine to weave, controlling the starting speed of the weaving machine to be 65-75% of the maximum working speed when the diameter of a single weaving wire is less than 0.15mm, and controlling the starting speed of the weaving machine to be 55-60% of the maximum working speed when the diameter of the single weaving wire is 0.15mm or more; when the weaving pitch is calculated, the weaving angle is controlled between 30 ℃ and 45 ℃, and the weaving density is not lower than 95%.
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CN104916355A (en) * 2015-06-25 2015-09-16 中天科技装备电缆有限公司 High resistance tensile cold reel cable and preparation method thereof
CN205751689U (en) * 2016-07-06 2016-11-30 宝上电缆有限公司 A kind of low smoke, zero halogen fire safe type converter cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116364358A (en) * 2023-05-06 2023-06-30 深圳深华新电缆实业有限公司 Environment-friendly heat-resistant flame-retardant wire and cable and preparation process thereof
CN116364358B (en) * 2023-05-06 2023-10-10 深圳深华新电缆实业有限公司 Environment-friendly heat-resistant flame-retardant wire and cable and preparation process thereof

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Application publication date: 20200428