CN108281227A - The preparation method of magnesium alloy foil in a kind of shielded cable and its shielded layer - Google Patents
The preparation method of magnesium alloy foil in a kind of shielded cable and its shielded layer Download PDFInfo
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- CN108281227A CN108281227A CN201810205489.4A CN201810205489A CN108281227A CN 108281227 A CN108281227 A CN 108281227A CN 201810205489 A CN201810205489 A CN 201810205489A CN 108281227 A CN108281227 A CN 108281227A
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/221—Longitudinally placed metal wires or tapes
- H01B7/225—Longitudinally placed metal wires or tapes forming part of an outer sheath
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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
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/226—Helicoidally wound metal wires or tapes
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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
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/228—Metal braid
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Crystallography & Structural Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a kind of shielded cable, the preparation method of magnesium alloy foil in especially a kind of shielded cable and its shielded layer.Shielded cable includes at least a conducting wire, conducting wire wrapping layer, interior protective jacket, shielded layer, outer protective jacket and waterproof layer, the periphery of each wire is coated with conducting wire wrapping layer, the periphery of conducting wire wrapping layer is coated with interior protective jacket, the periphery of interior protective jacket is coated with shielded layer, and the periphery of shielded layer is coated with outer protective jacket.Wherein shielded layer is magnesium alloy shielded layer, and waterproof layer is additionally provided between interior protective jacket and shielded layer.Shielded cable prepared by the present invention is simple in structure, light weight and shield effectiveness are good, and the tensile strength of cable is high, durable corrosion-resistant, and service life is longer；Wherein shielded layer density is low, manufacturing process is simply ripe, yield is high.
Description
Technical field
The present invention relates to a kind of shielded cable, the preparation of magnesium alloy foil in especially a kind of shielded cable and its shielded layer
Method.
Background technology
With the high speed development and electronics of modern electronics industry, the generally use of electric equipment products, electromagnetic interference has become one
The new social effects of pollution of kind.On the one hand, electromagnetic radiation can influence the health of people, and can be to the electronic equipment of surrounding
Severe jamming is caused, their working procedure is made to get muddled, generates malfunction；On the other hand, electromagnetic radiation can reveal letter
Breath, makes the instruments such as computer without security assurance information.Data show that in 1 kilometer of distance, the electromagnetism of computer display terminal
Wave can be stolen and restore information, cause phenomenon of giving away secrets.Interference caused by prevent electromagnetic radiation and leakage, using electromagnetic screen
It is one of main prevention method to cover material to carry out shielding.Shielding is improve electronic system and electronic equipment Electro Magnetic Compatibility important
One of measure is a kind of measure for preventing or reducing transmission of electromagnetic energy using shield, it can effectively inhibit in space and pass
The various electromagnetic interferences broadcast.
Currently used electromagnetic shielding material has metal, such as copper, aluminium, nickel, iron.Since metal has higher conductivity
(magnetic conductivity), so the reflection (absorption) to electromagnetic wave is higher, and its is yielding, and intensity is high, be current capability of electromagnetic shielding most
Good material.But these density metals are high, limit its application in certain fields.In order to find the shielding of lighter weight
Material is developed the composite material one of various coatings, composite material and foamed material, especially carbon nanotube and high polymer
Degree becomes research hotspot.Although these quality of materials are light, corrosion-resistant, capability of electromagnetic shielding is generally not so good as metal, and intensity is low,
Structural material is not suitable for, existing shielded cable leads to cable lacking there are shielding difference due to the defect of shielding material
It falls into.Therefore it is badly in need of seeking a kind of light weight, the shielded cable that density is low and shield effectiveness is good.
Invention content
The object of the present invention is to provide a kind of preparation methods of magnesium alloy foil in shielded cable and its shielded layer.This
Invent prepare shielded cable is simple in structure, light weight and shield effectiveness are good, the tensile strength of cable is high, durable corrosion-resistant, makes
With lasting a long time；Wherein shielded layer density is low, manufacturing process is simply ripe, yield is high.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of shielded cable includes at least a conducting wire, conducting wire wrapping layer, interior protective jacket, shielded layer, outer protective jacket
And waterproof layer, the periphery of each wire are coated with conducting wire wrapping layer, the periphery of the conducting wire wrapping layer is coated with interior anti-
Sheath is protected, the periphery of the interior protective jacket is coated with shielded layer, and the periphery of the shielded layer is coated with outer protective jacket.Wherein
The shielded layer is magnesium alloy shielded layer.The magnesium alloy structural material minimum as density in engineer application has a series of excellent
Point.For shielding material, compared with conventional metals, density is low, light weight, specific strength are high；With foamed material, coating,
Composite material is compared, and magnesium alloy shield effectiveness is high, can be used for structural material, and magnesium alloy is green engineering material, to environment friend
It is good.Compared with now widely used shielding material, magnesium alloy materials low-density has high than conductivity and than electromagnetic shielding effect
Can, it can be widely applied to the electromagnetic protection field to weight sensitive.It is additionally provided with waterproof between the interior protective jacket and shielded layer
Layer.The wherein described conducting wire is one or more in copper conductor, aluminium core conducting wire, alloy lead wire.The material of conducting wire wrapping layer can
Think ceramic silicon rubber, in the case where meeting fire or high temperature, ceramic silicon rubber can become the ceramic body of tubulose, have good
Insulation performance and heat insulation, shielded cable is effectively ensured can work normally under flame or hot conditions, not by the external world
Environment influences.The material of interior protective jacket and outer protective jacket is cross-linking radiation polyolefine material or cross-linking radiation EP rubbers
Material has the function of acidproof, anti-aging.Waterproof layer improves the water resistance of cable.
Shielded cable above-mentioned, the shielded layer are at least one in magnesium alloy foil shielded layer and magnesium alloy braid shielded net
Kind.Wherein magnesium alloy foil shielded layer is 0.05mm~0.1mm by thickness, and width is that 5mm~10mm magnesium alloy foils are wrapped around
It forms, cladding mode is helical coated；Or magnesium alloy foil shielded layer by thickness be 0.05mm~0.1mm, width be 20mm~
40mm magnesium alloy foils are wrapped around, and cladding mode coats for vertical bar.Wherein magnesium alloy braid shielded net is by thickness
0.05mm~0.1mm, width are that 3mm~8mm magnesium alloy foils are mutually worked out.
Shielded cable above-mentioned, the shielded layer include magnesium alloy foil shielded layer and magnesium alloy braid shielded net, wherein magnesium
Alloy Foil shielded layer is coated on the periphery of waterproof layer, and magnesium alloy braid shielded net is coated on the periphery of magnesium alloy foil shielded layer.
Shielded cable above-mentioned is additionally provided with filled layer between the conducting wire wrapping layer and interior protective jacket.Wherein filled layer
Filled with moisture-proof foaming agent, the moisture resistance of cable is increased.
Shielded cable above-mentioned is additionally provided with waterproof fibre film, the waterproof fibre film be set to shielded layer and outer protective jacket it
Between.The water proofing property of cable is further increased, ensures the stability of shielded cable transmission, extends its service life.
The thickness of shielded cable above-mentioned, the conducting wire wrapping layer is the ㎜ of 0.5 ㎜~1, the thickness of the interior protective jacket
Thickness for the ㎜ of 0.8 ㎜~1.5, the outer protective jacket is the ㎜ of 1 ㎜~2.
The preparation method of magnesium alloy foil, includes the following steps in the shielded layer of shielded cable above-mentioned：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 330 DEG C~360 DEG C；
S2, by 3.0mm hot-rolled sheet coils using 200 DEG C~250 DEG C rolling temperature warm-rollings as thickness 0.05mm on reversable mill
The magnesium alloy foil of~0.1mm；
S3 makes annealing treatment the magnesium alloy foil for rolling later in vacuum annealing furnace, annealing temperature be 300 DEG C~
350 DEG C, soaking time 30~45 minutes；
S4 will cut into narrowband by the magnesium alloy foil of annealing.
The preparation method of magnesium alloy foil, includes the following steps in the shielded layer of shielded cable above-mentioned：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 330 DEG C~360 DEG C；
S2, by 3.0mm hot-rolled sheet coils using 200 DEG C~250 DEG C rolling temperature warm-rollings as thickness 0.05mm on reversable mill
The magnesium alloy foil of~0.1mm；
The later magnesium alloy foil of warm-rolling is cut into narrowband by S3.
The preparation method of magnesium alloy foil in the shielded layer of aforementioned shielded cable, in magnesium alloy foil each alloy compositions and its
Mass percent is：It is 0.95%, Mn contents is 0.41% that Al content, which is 3.9%, Zn contents, surplus Mg.
The preparation method of magnesium alloy foil in the shielded layer of aforementioned shielded cable, in magnesium alloy foil each alloy compositions and its
Mass percent is：It is 0.88%, Mn contents is 0.34% that Al content, which is 6.4%, Zn contents, surplus Mg.
Compared with prior art, the invention has the beneficial effects that：
1, the shielded layer of shielded cable uses magnesium alloy foil, compared with now widely used shielding material, magnesium alloy
Material low-density has height than conductivity and than electromagnet shield effect, reduces cost and also reduce cable weight, more conducively shield
Application, the construction for covering cable, can be widely applied to the electromagnetic protection field to weight sensitive；
2, magnesium alloy foil has excellent mechanical property, in the thermal deformation process of magnesium alloy, since there is a large amount of
Simple substance α-Mn the particles of disperse educt, hinder growing up for alloy grain, and the intensity and room temperature for significantly improving magnesium alloy extend
Rate；
3, simple, at low cost using the shielded layer preparation process of magnesium alloy foil, by warm-rolling and heat treatment, make magnesium alloy
Crystal grain and the texture arrangement of foil are more advantageous to the shield effectiveness for improving material, to prepare high conductivity, high shield effectiveness
Shielded cable；
In short, shielded cable prepared by the present invention is simple in structure, light weight and shield effectiveness are good, the tensile strength of cable
High, durable corrosion-resistant, service life is longer；Wherein shielded layer density is low, manufacturing process is simply ripe, yield is high.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the present invention；
Fig. 2 be in the present invention shielded layer to the shielding mechanism schematic diagram of incident electromagnetic wave；
Fig. 3 is another structural schematic diagram of the present invention；
Fig. 4 is another structural schematic diagram of the present invention；
Fig. 5 is the structural schematic diagram of magnesium alloy foil shielded layer helical coated in the present invention；
Fig. 6 is the structural schematic diagram that magnesium alloy foil shielded layer vertical bar coats in the present invention.
The meaning of reference numeral：1- conducting wires, 2- conducting wire wrapping layers, protective jacket in 3-, 4- shielded layers, 41- magnesium alloy foils
Shielded layer, 42- magnesium alloy braid shielded nets, 5- filled layers, the outer protective jackets of 6-, 7- waterproof layers, 8- waterproof fibre films.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Specific implementation mode
The embodiment of the present invention 1：A kind of shielded cable includes four conducting wires 1, conducting wire wrapping layer 2, interior protective jacket 3, screen
Cover layer 4, outer protective jacket 6 and waterproof layer 7, the periphery of each wire 1 is coated with conducting wire wrapping layer 2, the conducting wire around
The periphery of covering 2 is coated with interior protective jacket 3, and the periphery of the interior protective jacket 3 is coated with shielded layer 4, the shielded layer 4
Periphery is coated with outer protective jacket 6.The wherein described shielded layer 4 is magnesium alloy shielded layer.Magnesium alloy is as density in engineer application
Minimum structural material has series of advantages.For shielding material, compared with conventional metals, density is low, quality
Gently, specific strength is high；Compared with foamed material, coating, composite material, magnesium alloy shield effectiveness is high, can be used for structural material, and magnesium
Alloy is green engineering material, environmentally friendly.Compared with now widely used shielding material, magnesium alloy materials low-density,
With height than conductivity and than electromagnet shield effect, the electromagnetic protection field to weight sensitive can be widely applied to.It is described interior anti-
It is additionally provided with waterproof layer 7 between shield sheath 3 and shielded layer 4.The wherein described conducting wire 1 is in copper conductor, aluminium core conducting wire, alloy lead wire
It is one or more.The material of conducting wire wrapping layer 2 can be ceramic silicon rubber.In the case where meeting fire or high temperature, ceramic silicon
Rubber can become the ceramic body of tubulose, have good insulation performance and heat insulation, be effectively ensured shielded cable in flame or
It can work normally, not be affected by the external environment under person's hot conditions.The material of interior protective jacket 3 and outer protective jacket 6 is spoke
According to crosslinked polyolefin materials or cross-linking radiation EP rubbers material, have the function of acidproof, anti-aging.Waterproof layer 7 improves
The water resistance of cable.
The shielded layer 4 is at least one of magnesium alloy foil shielded layer 41 and magnesium alloy braid shielded net 42.
(1) specifically, as shown in Figure 3 and Figure 5, the shielded layer 4 is only magnesium alloy foil shielded layer 41, wherein magnesium alloy foil
Shielded layer 41 is 0.05mm~0.1mm by thickness, and width is that 5mm~10mm magnesium alloy foils are wrapped around, and coats mode
For helical coated.
(2) specifically, as shown in Figure 3 and Figure 6, the shielded layer 4 is only magnesium alloy foil shielded layer 41, wherein magnesium alloy foil
Shielded layer 41 is 0.05mm~0.1mm by thickness, and width is that 20mm~40mm magnesium alloy foils are wrapped around, and coats mode
It is coated for vertical bar.
(3) specifically, as shown in figure 4, the shielded layer 4 is only magnesium alloy braid shielded net 42, wherein magnesium alloy weaves
Gauze screen 42 is 0.05mm~0.1mm by thickness, and width is that 3mm~8mm magnesium alloy foils are mutually worked out.Specifically, magnesium
Alloy braid shielded net 42 is formed by 200 magnesium alloy foil weavings, enhances the tension mechanical performance of cable.
(4) specifically, as shown in Fig. 1, Fig. 5 and Fig. 6, the shielded layer 4 includes magnesium alloy foil shielded layer 41 and magnesium alloy
Braid shielded net 42, wherein magnesium alloy foil shielded layer 41 are coated on the periphery of waterproof layer 7, and magnesium alloy braid shielded net 42 is coated on
The periphery of magnesium alloy foil shielded layer 41.
Wherein the specific material of magnesium alloy foil and thickness are according to the type of required shielded cable and the diameter of shielded cable
It is selected.
Embodiment 2：As shown in Figure 1, a kind of shielded cable include four conducting wires 1, conducting wire wrapping layer 2, interior protective jacket 3,
The periphery of shielded layer 4, outer protective jacket 6 and waterproof layer 7, each wire 1 is coated with conducting wire wrapping layer 2, the conducting wire
The periphery of wrapping layer 2 is coated with interior protective jacket 3, and the periphery of the interior protective jacket 3 is coated with shielded layer 4, the shielded layer 4
Periphery be coated with outer protective jacket 6.The wherein described shielded layer 4 is magnesium alloy shielded layer.Magnesium alloy is as close in engineer application
Minimum structural material is spent, there is series of advantages.For shielding material, compared with conventional metals, density is low, quality
Gently, specific strength is high；Compared with foamed material, coating, composite material, magnesium alloy shield effectiveness is high, can be used for structural material, and magnesium
Alloy is green engineering material, environmentally friendly.Compared with now widely used shielding material, magnesium alloy materials low-density,
With height than conductivity and than electromagnet shield effect, the electromagnetic protection field to weight sensitive can be widely applied to.It is described interior anti-
It is additionally provided with waterproof layer 7 between shield sheath 3 and shielded layer 4.The wherein described conducting wire 1 is in copper conductor, aluminium core conducting wire, alloy lead wire
It is one or more.The material of conducting wire wrapping layer 2 can be ceramic silicon rubber.In the case where meeting fire or high temperature, ceramic silicon
Rubber can become the ceramic body of tubulose, have good insulation performance and heat insulation, be effectively ensured shielded cable in flame or
It can work normally, not be affected by the external environment under person's hot conditions.The material of interior protective jacket 3 and outer protective jacket 6 is spoke
According to crosslinked polyolefin materials or cross-linking radiation EP rubbers material, have the function of acidproof, anti-aging.Waterproof layer 7 improves
The water resistance of cable.It is additionally provided with filled layer 5 between the conducting wire wrapping layer 2 and interior protective jacket 3.Wherein filled layer 5 is filled
There is moisture-proof foaming agent, increases the moisture resistance of cable.
Embodiment 3：As shown in Figure 1, a kind of shielded cable include six conductors 1, conducting wire wrapping layer 2, interior protective jacket 3,
The periphery of shielded layer 4, outer protective jacket 6 and waterproof layer 7, each wire 1 is coated with conducting wire wrapping layer 2, the conducting wire
The periphery of wrapping layer 2 is coated with interior protective jacket 3, and the periphery of the interior protective jacket 3 is coated with shielded layer 4, the shielded layer 4
Periphery be coated with outer protective jacket 6.The wherein described shielded layer 4 is that magnesium alloy foil shields stratum reticulare shielded layer.Magnesium alloy is as work
The minimum structural material of density in Cheng Yingyong has series of advantages.For shielding material, compared with conventional metals,
Density is low, light weight, specific strength are high；Compared with foamed material, coating, composite material, magnesium alloy shield effectiveness is high, can be used for tying
Structure material, and magnesium alloy is green engineering material, it is environmentally friendly.Compared with now widely used shielding material, magnesium alloy
Material low-density has height than conductivity and than electromagnet shield effect, can be widely applied to the electromagnetic protection neck to weight sensitive
Domain.It is additionally provided with waterproof layer 7 between the interior protective jacket 3 and shielded layer 4.The wherein described conducting wire 1 is copper conductor, aluminium core is led
It is one or more in line, alloy lead wire.The material of conducting wire wrapping layer 2 can be ceramic silicon rubber.It is fiery or high temperature meeting
In the case of, ceramic silicon rubber can become the ceramic body of tubulose, have good insulation performance and heat insulation, shielding is effectively ensured
Cable can work normally under flame or hot conditions, not be affected by the external environment.Interior protective jacket 3 and outer protective jacket
6 material is cross-linking radiation polyolefine material or cross-linking radiation EP rubbers material, is had the function of acidproof, anti-aging.It is anti-
Water layer 7 improves the water resistance of cable.Shielded cable is additionally provided with waterproof fibre film 8, and the waterproof fibre film 8 is set to shielded layer
Between 4 and outer protective jacket 6.The water proofing property of cable is further increased, ensures the stability of shielded cable transmission, extending it makes
Use the service life.
Embodiment 4：As shown in Figure 1, a kind of shielded cable includes an at least conducting wire 1, conducting wire wrapping layer 2, interior protection shield
Set 3, shielded layer 4, outer protective jacket 6 and waterproof layer 7, the periphery of each wire 1 is coated with conducting wire wrapping layer 2, described
The periphery of conducting wire wrapping layer 2 is coated with interior protective jacket 3, and the periphery of the interior protective jacket 3 is coated with shielded layer 4, the screen
The periphery for covering layer 4 is coated with outer protective jacket 6.The wherein described shielded layer 4 is magnesium alloy shielded layer.Magnesium alloy is as engineer application
The minimum structural material of middle density has series of advantages.For shielding material, compared with conventional metals, density is low,
Light weight, specific strength are high；Compared with foamed material, coating, composite material, magnesium alloy shield effectiveness is high, can be used for structural material,
And magnesium alloy is green engineering material, it is environmentally friendly.Compared with now widely used shielding material, magnesium alloy materials are low close
Degree has height than conductivity and than electromagnet shield effect, can be widely applied to the electromagnetic protection field to weight sensitive.In described
Waterproof layer 7 is additionally provided between protective jacket 3 and shielded layer 4.The wherein described conducting wire 1 is copper conductor, aluminium core conducting wire, alloy lead wire
In it is one or more.The material of conducting wire wrapping layer 2 can be ceramic silicon rubber.In the case where meeting fire or high temperature, ceramics
Silicon rubber can become the ceramic body of tubulose, have good insulation performance and heat insulation, shielded cable is effectively ensured in flame
Or can be worked normally under hot conditions, it is not affected by the external environment.The material of interior protective jacket 3 and outer protective jacket 6 is
Cross-linking radiation polyolefine material or cross-linking radiation EP rubbers material, have the function of acidproof, anti-aging.Waterproof layer 7 improves
The water resistance of cable.The thickness of conducting wire wrapping layer 2 is the ㎜ of 0.5 ㎜~1, the thickness of the interior protective jacket 3 be 0.8 ㎜~
The thickness of 1.5 ㎜, the outer protective jacket 6 are the ㎜ of 1 ㎜~2.The type and shielding that specifically thickness can be according to required shielded cable
The diameter of cable is selected.
Embodiment 5：As shown in Figure 1, in the shielded layer of aforementioned shielded cable magnesium alloy foil preparation method, including it is following
Step：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 330 DEG C~360 DEG C；
S2, by 3.0mm hot-rolled sheet coils using 200 DEG C~250 DEG C rolling temperature warm-rollings as thickness 0.05mm on reversable mill
The magnesium alloy foil of~0.1mm；
S3 makes annealing treatment the magnesium alloy foil for rolling later in vacuum annealing furnace, annealing temperature be 300 DEG C~
350 DEG C, soaking time 30~45 minutes；
S4 will cut into narrowband by the magnesium alloy foil of annealing.
Each alloy compositions and its mass percent are in magnesium alloy foil：Al content is that 3.9%, Zn contents are 0.95%,
Mn contents are 0.41%, surplus Mg.
Embodiment 6：As shown in Figure 1, in the shielded layer of aforementioned shielded cable magnesium alloy foil preparation method, including it is following
Step：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 330 DEG C~360 DEG C；
S2, by 3.0mm hot-rolled sheet coils using 200 DEG C~250 DEG C rolling temperature warm-rollings as thickness 0.05mm on reversable mill
The magnesium alloy foil of~0.1mm；
S3 makes annealing treatment the magnesium alloy foil for rolling later in vacuum annealing furnace, annealing temperature be 300 DEG C~
350 DEG C, soaking time 30~45 minutes；
S4 will cut into narrowband by the magnesium alloy foil of annealing.
Each alloy compositions and its mass percent are in magnesium alloy foil：Al content is that 6.4%, Zn contents are 0.88%,
Mn contents are 0.34%, surplus Mg.
Embodiment 7：As shown in Figure 1, in the shielded layer of shielded cable above-mentioned magnesium alloy foil preparation method, including with
Lower step：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 330 DEG C~360 DEG C；
S2, by 3.0mm hot-rolled sheet coils using 200 DEG C~250 DEG C rolling temperature warm-rollings as thickness 0.05mm on reversable mill
The magnesium alloy foil of~0.1mm；
The later magnesium alloy foil of warm-rolling is cut into narrowband by S3.
Embodiment 8：As shown in Figure 1, in the shielded layer of aforementioned shielded cable magnesium alloy foil preparation method, including it is following
Step：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 345 DEG C；
S2, by 3.0mm hot-rolled sheet coils using 220 DEG C of rolling temperature warm-rollings as thickness 0.05mm~0.1mm on reversable mill
Magnesium alloy foil；
S3 makes annealing treatment the magnesium alloy foil for rolling later in vacuum annealing furnace, annealing temperature be 310 DEG C~
320 DEG C, soaking time 35~40 minutes；
S4 will cut into narrowband by the magnesium alloy foil of annealing.
The shielding principle of shielded layer in the present invention：As shown in Fig. 2, when electromagnetic wave reaches 4 surface of shielded layer, due to air
Reflection is generated to incidence wave with the discontinuous of impedance on the interface of magnesium alloy, this kind reflection does not require shielded layer 4 that must have one
Fixed thickness is only required discontinuous on interface；It is not reflected away by a surface of shielded layer 4 (i.e. the first interface in Fig. 2)
And enter the energy inside shielded layer 4, during propagating forward, decayed by shielded layer 4；It not yet declines in shielded layer 4
The dump energy cut encounters magnesium alloy-air impedance when passing to another surface (i.e. the second contact surface in Fig. 2) of shielded layer 4
Discontinuous interface can form secondary reflection again, and return in shielded layer 4.This two surfaces for being reflected in shielded layer 4
There are multiple reflections on (i.e. the first interface and second contact surface in Fig. 2), the final remaining electromagnetic wave seldom not yet attenuated is from shielding
Outflow in layer 4.
Shield effectiveness calculation formula is as follows：
Or
Wherein：E0、H0--- electricity (magnetic) field that certain in space is put when not plus shielding；E1、H1--- adding should in space after shielding
Electricity (magnetic) field of point.
Claims (10)
1. a kind of shielded cable, which is characterized in that including at least a conducting wire (1), conducting wire wrapping layer (2), interior protective jacket
(3), shielded layer (4), outer protective jacket (6) and waterproof layer (7), it is wrapped that the periphery of each wire (1) is coated with conducting wire
The periphery of layer (2), the conducting wire wrapping layer (2) is coated with interior protective jacket (3), the periphery cladding of the interior protective jacket (3)
There are shielded layer (4), the periphery of the shielded layer (4) to be coated with outer protective jacket (6)；The wherein described shielded layer (4) is magnesium alloy
Shielded layer is additionally provided with waterproof layer (7) between the interior protective jacket (3) and shielded layer (4).
2. shielded cable according to claim 1, which is characterized in that the shielded layer (4) is magnesium alloy foil shielded layer
(41) and at least one of magnesium alloy braid shielded net (42)；
Wherein magnesium alloy foil shielded layer (41) is 0.05mm~0.1mm by thickness, and width winds for 5mm~10mm magnesium alloy foils
It coats, cladding mode is helical coated；Or magnesium alloy foil shielded layer (41) is 0.05mm~0.1mm, width by thickness
It is wrapped around for 20mm~40mm magnesium alloy foils, cladding mode coats for vertical bar；
Wherein magnesium alloy braid shielded net (42) is 0.05mm~0.1mm by thickness, and width is 3mm~8mm magnesium alloy foil phases
Mutually work out.
3. shielded cable according to claim 2, which is characterized in that the shielded layer (4) includes magnesium alloy foil shielded layer
(41) and magnesium alloy braid shielded net (42), wherein magnesium alloy foil shielded layer (41) are coated on the periphery of waterproof layer (7), magnesium alloy
Braid shielded net (42) is coated on the periphery of magnesium alloy foil shielded layer (41).
4. shielded cable according to claim 1, which is characterized in that the conducting wire wrapping layer (2) and interior protective jacket (3)
Between be additionally provided with filled layer (5).
5. shielded cable according to claim 1, which is characterized in that be additionally provided with waterproof fibre film (8), the waterproof fibre
Film (8) is set between shielded layer (4) and outer protective jacket (6).
6. shielded cable according to claim 1, which is characterized in that the thickness of the conducting wire wrapping layer (2) be 0.5 ㎜~
The thickness of 1 ㎜, the interior protective jacket (3) are the ㎜ of 0.8 ㎜~1.5, and the thickness of the outer protective jacket (6) is the ㎜ of 1 ㎜~2.
7. according to the preparation method of magnesium alloy foil in the shielded layer of any shielded cable of claim 1~6, feature exists
In including the following steps：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 330 DEG C~360 DEG C；
S2, by 3.0mm hot-rolled sheet coils on reversable mill using 200 DEG C~250 DEG C rolling temperature warm-rollings as thickness 0.05mm~
The magnesium alloy foil of 0.1mm；
S3 makes annealing treatment the magnesium alloy foil for rolling later in vacuum annealing furnace, and annealing temperature is 300 DEG C~350 DEG C,
Soaking time 30~45 minutes；
S4 will cut into narrowband by the magnesium alloy foil of annealing.
8. according to the preparation method of magnesium alloy foil in the shielded layer of any shielded cable of claim 1~6, feature exists
In including the following steps：
S1, it is 3.0mm hot-rolled sheet coils that the magnesium ingot of smelting is rolled into thickness at 330 DEG C~360 DEG C；
S2, by 3.0mm hot-rolled sheet coils on reversable mill using 200 DEG C~250 DEG C rolling temperature warm-rollings as thickness 0.05mm~
The magnesium alloy foil of 0.1mm；
The later magnesium alloy foil of warm-rolling is cut into narrowband by S3.
9. the preparation method of magnesium alloy foil in the shielded layer of shielded cable according to claim 7, which is characterized in that magnesium
Each alloy compositions and its mass percent are in alloy foil：Al content is that 3.9%, Zn contents are that 0.95%, Mn contents are
0.41%, surplus Mg.
10. the preparation method of magnesium alloy foil in the shielded layer of shielded cable according to claim 7, which is characterized in that
Each alloy compositions and its mass percent are in magnesium alloy foil：Al content is that 6.4%, Zn contents are that 0.88%, Mn contents are
0.34%, surplus Mg.
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| CN113715237A (en) * | 2021-09-01 | 2021-11-30 | 深圳市动盈先进材料有限公司 | Production process of electromagnetic shielding material based on 5G base station |
| WO2024032757A1 (en) * | 2022-08-12 | 2024-02-15 | 长春捷翼汽车科技股份有限公司 | Cable having shielding structure |
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