CN110752055A - Flexible conductor double-shielding anti-interference cable and preparation method thereof - Google Patents
Flexible conductor double-shielding anti-interference cable and preparation method thereof Download PDFInfo
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- H01B7/00—Insulated conductors or cables characterised by their form
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- 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
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Abstract
The invention discloses a soft conductor double-shielding anti-interference cable which comprises an insulating layer, wherein an inner core is arranged at the center of the insulating layer, a protective layer is arranged outside the inner core, the protective layer is bonded in the insulating layer, a plurality of conductors are arranged around the inner core at equal intervals, an inner shielding layer is bonded on the outer side of each conductor through epoxy resin, an inner protective layer is bonded on the outer side wall of each inner shielding layer through epoxy resin, the inner protective layer is bonded between the inner protective layer and the insulating layer, and an outer shielding layer is arranged on the outer side wall of the insulating layer. According to the invention, three layers of shielding signals are divided together, and three layers of synergistic effects are achieved, so that the cable has strong anti-interference signal capability, the diffusion of internal transmission signals can be effectively prevented, the mutual interference among all conductors can be avoided, the interference of external signals to internal signals can be prevented, the inner core enhances the signal transmission capability of the cable, and the interference of external signals to the cable can be avoided.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a flexible conductor double-shielding anti-interference cable and a preparation method thereof.
Background
Cables are generally rope-like cables made by stranding several or groups of conductors, at least two in each group, each group being insulated from each other and often twisted around a center, the entire outer surface being covered with a highly insulating covering. The device is erected in the air or installed underground or underwater for telecommunication or power transmission. In 1832, the sars and retired officer schooling grid buried the telegraph line underground, and the six wires were insulated with rubber and placed in a glass tube, which is the earliest underground cable in the world.
When the electromagnetic field is nearby or the distance between two cables is short, signals transmitted by the inner conductors of the cables may be interfered by external signals, so that the phenomenon of weakening or signal distortion of internal signals occurs. The internal and external anti-signal interference capability of the common cable is not strong, so that the conditions of signal transmission error, short signal transmission distance and the like often occur.
In order to solve the above problems, we propose a flexible conductor double-shielded anti-interference cable to solve the above problems.
Disclosure of Invention
The invention aims to overcome the defects that the common cable has poor internal and external signal interference resistance, so that signal transmission errors, short signal transmission distance and the like frequently occur in the prior art, and provides a flexible conductor double-shielding anti-interference cable and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a soft conductor double-shielded anti-interference cable, includes the insulating layer, the center department of insulating layer is provided with the inner core, the inner core is provided with the well core protective layer outward, the well core protective layer bonds in the insulating layer, the peripheral equidistant ring of inner core is listed as there are a plurality of conductors, every the outside of conductor all bonds through epoxy has the internal shield layer, the lateral wall on internal shield layer all bonds through epoxy has the internal protective layer, bond between internal protective layer and the insulating layer, be provided with the external shield layer on the lateral wall of insulating layer.
Preferably, an outer protective layer is arranged on the outer side wall of the outer shielding layer, and an anti-interference layer is arranged on the outer side wall of the outer protective layer.
Preferably, the copper conductor is formed by bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm, the outer diameter of the copper conductor is 12.7mm, and the cross section of the copper conductor is 95mm 2.
A preparation method of a soft conductor double-shielding anti-interference cable comprises the following steps:
the method comprises the following steps: smelting electrolytic copper, and continuously casting and rolling to obtain an electrolytic copper rod with the diameter of 8.0 mm;
step two: drawing, annealing and tinning a phi 8.0mm electrolytic copper rod to prepare a phi 2.52mm soft copper wire;
step three: bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm into a conductor with the outer diameter of 12.7mm and the diameter of 95mm 2;
step four: the insulating layer and the inner shielding layer form an insulating shielding layer, and an extrusion die is adopted;
step five: an inner shielding layer with the outer diameter of 21.8mm and formed by wrapping oxygen-free soft copper belts with the thickness of 0.10mm and the width of 19mm in the insulating shielding layer;
step six: wrapping a barrier layer with the thickness of 0.20mm and the width of 35mm outside the insulating shielding layer to form an outer shielding layer with the outer diameter of 60.8 mm;
step seven: then longitudinally wrapping an aluminum-plastic composite belt with the thickness of 0.20mm and the width of 80mm on the barrier layer, and then extruding a polyethylene moisture barrier layer with the thickness of 1.2 mm;
step eight: wrapping an outer protective layer with the thickness of 0.2mm at the gap outside the moisture barrier layer;
step nine: finally, extruding an anti-interference layer of thermoplastic halogen-free low-smoke anti-ultraviolet waterproof and oil-proof polyolefin with the thickness of 2.0mm outside the outer protective layer;
step ten: and finally, checking and warehousing qualified products.
Compared with the prior art, the invention has the beneficial effects that:
the three-layer shielding signal is divided, and the three layers of synergistic action ensures that the anti-interference signal capability of the cable is strong, can effectively prevent the diffusion of internal transmission signals, avoids the mutual interference between conductors, can prevent the interference of external signals to internal signals, enhances the signal transmission capability of the cable by the inner core, and avoids the interference of external signals on the cable.
Drawings
Fig. 1 is a front structural cross-sectional view of a flexible conductor double-shielded anti-interference cable according to the present invention.
In the figure: 1 inner core, 2 insulating layers, 3 outer protective layers, 4 anti-interference layers, 5 inner protective layers, 6 inner shielding layers, 7 outer shielding layers, 8 conductors and 9 middle core protective layers.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example one
Referring to fig. 1, a soft conductor double-shielded anti-interference cable comprises an insulating layer 2, an inner core 1 is arranged at the center of the insulating layer 2, a middle core protective layer 9 is arranged outside the inner core 1, the middle core protective layer 9 is bonded in the insulating layer 2, a plurality of conductors 8 are arranged around the inner core 1 at equal intervals, each copper conductor 8 is formed by stranding 19 tinned soft copper wires with the diameter of 2.52mm, the outer diameter of each copper conductor is 12.7mm, the cross section of each copper conductor is 95mm2, an inner shielding layer 6 is bonded on the outer side of each conductor 8 through epoxy resin, an inner protective layer 5 is bonded on the outer side wall of each inner shielding layer 6 through epoxy resin, the inner protective layer 5 is bonded between each inner shielding layer 5 and the insulating layer 2, an outer shielding layer 7 is arranged on the outer side wall of the insulating layer 2, an outer protective layer 3 is arranged on the outer side wall of;
a preparation method of a soft conductor double-shielding anti-interference cable comprises the following steps:
the method comprises the following steps: smelting electrolytic copper, and continuously casting and rolling to obtain an electrolytic copper rod with the diameter of 8.0 mm;
step two: drawing, annealing and tinning a phi 8.0mm electrolytic copper rod to prepare a phi 2.52mm soft copper wire;
step three: bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm into a conductor with the outer diameter of 12.7mm and the diameter of 95mm 2;
step four: the insulating layer 2 and the inner shielding layer 6 form an insulating shielding layer, and an extrusion die is adopted;
step five: an inner shielding layer 6 with the outer diameter of 21.8mm and formed by wrapping an oxygen-free soft copper belt with the thickness of 0.10mm and the width of 19mm in the insulating shielding layer;
step six: wrapping a blocking layer with the thickness of 0.20mm and the width of 35mm outside the insulating shielding layer to form an outer shielding layer 7 with the outer diameter of 60.8 mm;
step seven: then longitudinally wrapping an aluminum-plastic composite belt with the thickness of 0.20mm and the width of 80mm on the barrier layer, and then extruding a polyethylene moisture barrier layer with the thickness of 1.2 mm;
step eight: then wrapping an outer protective layer 3 with the thickness of 0.2mm at the gap outside the moisture barrier layer;
step nine: finally, extruding a thermoplastic anti-interference layer 4 of halogen-free low-smoke anti-ultraviolet waterproof and oilproof polyolefin with the thickness of 2.0mm outside the outer protective layer 3;
step ten: and finally, checking and warehousing qualified products.
The preparation method of the outer protective layer 3 and the inner protective layer 5 comprises the following steps:
s1: placing polyurethane rubber and tetramethyl thiuram disulfide in corresponding weight parts in an internal mixer, internally mixing for 10-15 min at 81-89 ℃, and vulcanizing to obtain a rubber mixed solution;
s2: adding polyvinyl chloride with corresponding weight parts into the rubber mixed solution, raising the temperature to 105-115 ℃, carrying out banburying for 3-5 min, keeping the temperature at 110-115 ℃, adding dihexyl phthalate, butyl stearate, liquid silica gel and antioxidant with corresponding weight parts, continuing banburying for 3-5 min, and extruding by a screw extruder to obtain the protective layer.
Example two
A double-shielded anti-interference cable with soft conductors comprises an insulating layer 2, wherein an inner core 1 is arranged at the center of the insulating layer 2, a plurality of conductors 8 are arranged around the inner core 1 at equal intervals, each conductor 8 is formed by stranding 19 tinned soft copper wires with the diameter of 2.52mm, the outer diameter of each conductor 8 is 12.7mm, the cross section of each conductor is 95mm2, an inner shielding layer 6 is bonded to the outer side of each conductor 8 through epoxy resin, an inner protective layer 5 is bonded to the outer side wall of each inner shielding layer 6 through epoxy resin, the inner protective layer 5 is bonded to the insulating layer 2, an outer shielding layer 7 is arranged on the outer side wall of the insulating layer 2, an outer protective layer 3 is arranged on the outer side wall of the outer shielding layer 7, and an anti-interference layer 4 is arranged on the outer;
a preparation method of a soft conductor double-shielding anti-interference cable comprises the following steps:
the method comprises the following steps: smelting electrolytic copper, and continuously casting and rolling to obtain an electrolytic copper rod with the diameter of 8.0 mm;
step two: drawing, annealing and tinning a phi 8.0mm electrolytic copper rod to prepare a phi 2.52mm soft copper wire;
step three: bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm into a conductor with the outer diameter of 12.7mm and the diameter of 95mm 2;
step four: the insulating layer 2 and the inner shielding layer 6 form an insulating shielding layer, and an extrusion die is adopted;
step five: an inner shielding layer 6 with the outer diameter of 21.8mm and formed by wrapping an oxygen-free soft copper belt with the thickness of 0.10mm and the width of 19mm in the insulating shielding layer;
step six: wrapping a blocking layer with the thickness of 0.20mm and the width of 35mm outside the insulating shielding layer to form an outer shielding layer 7 with the outer diameter of 60.8 mm;
step seven: then longitudinally wrapping an aluminum-plastic composite belt with the thickness of 0.20mm and the width of 80mm on the barrier layer, and then extruding a polyethylene moisture barrier layer with the thickness of 1.2 mm;
step eight: then wrapping an outer protective layer 3 with the thickness of 0.2mm at the gap outside the moisture barrier layer;
step nine: finally, extruding a thermoplastic anti-interference layer 4 of halogen-free low-smoke anti-ultraviolet waterproof and oilproof polyolefin with the thickness of 2.0mm outside the outer protective layer 3;
step ten: and finally, checking and warehousing qualified products.
The preparation method of the outer protective layer 3 and the inner protective layer 5 comprises the following steps:
s1: placing polyurethane rubber and tetramethyl thiuram disulfide in corresponding weight parts in an internal mixer, internally mixing for 10-15 min at 81 ℃, and vulcanizing to obtain a rubber mixed solution;
s2: adding polyvinyl chloride with corresponding weight parts into the rubber mixed solution, raising the temperature to 105 ℃, carrying out banburying for 3-5 min, keeping the temperature at 110 ℃, adding dihexyl phthalate, butyl stearate, liquid silica gel and antioxidant with corresponding weight parts, continuing banburying for 3-5 min, and extruding by a screw extruder to obtain the protective layer.
EXAMPLE III
A double-shielded anti-interference cable with soft conductors comprises an insulating layer 2, wherein an inner core 1 is arranged at the center of the insulating layer 2, a plurality of conductors 8 are arranged around the inner core 1 at equal intervals, each conductor 8 is formed by stranding 19 tinned soft copper wires with the diameter of 2.52mm, the outer diameter of each conductor 8 is 12.7mm, the cross section of each conductor is 95mm2, an inner shielding layer 6 is bonded to the outer side of each conductor 8 through epoxy resin, an inner protective layer 5 is bonded to the outer side wall of each inner shielding layer 6 through epoxy resin, the inner protective layer 5 is bonded to the insulating layer 2, an outer shielding layer 7 is arranged on the outer side wall of the insulating layer 2, an outer protective layer 3 is arranged on the outer side wall of the outer shielding layer 7, and an anti-interference layer 4 is arranged on the outer;
a preparation method of a soft conductor double-shielding anti-interference cable comprises the following steps:
the method comprises the following steps: smelting electrolytic copper, and continuously casting and rolling to obtain an electrolytic copper rod with the diameter of 8.0 mm;
step two: drawing, annealing and tinning a phi 8.0mm electrolytic copper rod to prepare a phi 2.52mm soft copper wire;
step three: bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm into a conductor with the outer diameter of 12.7mm and the diameter of 95mm 2;
step four: the insulating layer 2 and the inner shielding layer 6 form an insulating shielding layer, and an extrusion die is adopted;
step five: an inner shielding layer 6 with the outer diameter of 21.8mm and formed by wrapping an oxygen-free soft copper belt with the thickness of 0.10mm and the width of 19mm in the insulating shielding layer;
step six: wrapping a blocking layer with the thickness of 0.20mm and the width of 35mm outside the insulating shielding layer to form an outer shielding layer 7 with the outer diameter of 60.8 mm;
step seven: then longitudinally wrapping an aluminum-plastic composite belt with the thickness of 0.20mm and the width of 80mm on the barrier layer, and then extruding a polyethylene moisture barrier layer with the thickness of 1.2 mm;
step eight: then wrapping an outer protective layer 3 with the thickness of 0.2mm at the gap outside the moisture barrier layer;
step nine: finally, extruding a thermoplastic anti-interference layer 4 of halogen-free low-smoke anti-ultraviolet waterproof and oilproof polyolefin with the thickness of 2.0mm outside the outer protective layer 3;
step ten: and finally, checking and warehousing qualified products.
The preparation method of the outer protective layer 3 and the inner protective layer 5 comprises the following steps:
s1: placing polyurethane rubber and tetramethyl thiuram disulfide in corresponding weight parts in an internal mixer, internally mixing for 10-15 min at 89 ℃, and vulcanizing to obtain a rubber mixed solution;
s2: adding polyvinyl chloride with corresponding weight parts into the rubber mixed solution, raising the temperature to 115 ℃, carrying out banburying for 3-5 min, keeping the temperature at 115 ℃, adding dihexyl phthalate, butyl stearate, liquid silica gel and antioxidant with corresponding weight parts, continuing banburying for 3-5 min, and extruding by a screw extruder to obtain the protective layer.
Example four
A double-shielded anti-interference cable with soft conductors comprises an insulating layer 2, wherein an inner core 1 is arranged at the center of the insulating layer 2, a plurality of conductors 8 are arranged around the inner core 1 at equal intervals, each conductor 8 is formed by stranding 19 tinned soft copper wires with the diameter of 2.52mm, the outer diameter of each conductor 8 is 12.7mm, the cross section of each conductor is 95mm2, an inner shielding layer 6 is bonded to the outer side of each conductor 8 through epoxy resin, an inner protective layer 5 is bonded to the outer side wall of each inner shielding layer 6 through epoxy resin, the inner protective layer 5 is bonded to the insulating layer 2, an outer shielding layer 7 is arranged on the outer side wall of the insulating layer 2, an outer protective layer 3 is arranged on the outer side wall of the outer shielding layer 7, and an anti-interference layer 4 is arranged on the outer;
a preparation method of a soft conductor double-shielding anti-interference cable comprises the following steps:
the method comprises the following steps: smelting electrolytic copper, and continuously casting and rolling to obtain an electrolytic copper rod with the diameter of 8.0 mm;
step two: drawing, annealing and tinning a phi 8.0mm electrolytic copper rod to prepare a phi 2.52mm soft copper wire;
step three: bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm into a conductor with the outer diameter of 12.7mm and the diameter of 95mm 2;
step four: the insulating layer 2 and the inner shielding layer 6 form an insulating shielding layer, and an extrusion die is adopted;
step five: an inner shielding layer 6 with the outer diameter of 21.8mm and formed by wrapping an oxygen-free soft copper belt with the thickness of 0.10mm and the width of 19mm in the insulating shielding layer;
step six: wrapping a blocking layer with the thickness of 0.20mm and the width of 35mm outside the insulating shielding layer to form an outer shielding layer 7 with the outer diameter of 60.8 mm;
step seven: then longitudinally wrapping an aluminum-plastic composite belt with the thickness of 0.20mm and the width of 80mm on the barrier layer, and then extruding a polyethylene moisture barrier layer with the thickness of 1.2 mm;
step eight: then wrapping an outer protective layer 3 with the thickness of 0.2mm at the gap outside the moisture barrier layer;
step nine: finally, extruding a thermoplastic anti-interference layer 4 of halogen-free low-smoke anti-ultraviolet waterproof and oilproof polyolefin with the thickness of 2.0mm outside the outer protective layer 3;
step ten: and finally, checking and warehousing qualified products.
The preparation method of the outer protective layer 3 and the inner protective layer 5 comprises the following steps:
s1: placing polyurethane rubber and tetramethyl thiuram disulfide in corresponding weight parts in an internal mixer, internally mixing for 10-15 min at 81 ℃, and vulcanizing to obtain a rubber mixed solution;
s2: adding polyvinyl chloride with corresponding weight parts into the rubber mixed solution, raising the temperature to 105 ℃, carrying out banburying for 3-5 min, keeping the temperature at 110 ℃, adding dihexyl phthalate, butyl stearate, liquid silica gel and antioxidant with corresponding weight parts, continuing banburying for 3-5 min, and extruding by a screw extruder to obtain the protective layer.
EXAMPLE five
A double-shielding anti-interference cable with soft conductors comprises an insulating layer 2, wherein an inner core 1 is arranged at the center of the insulating layer 2, a plurality of conductors 8 are arranged around the inner core 1 at equal intervals, each copper conductor 8 is formed by stranding 19 tinned soft copper wires with the diameter of 2.52mm, the outer diameter of each copper conductor is 12.7mm, the cross section of each copper conductor is 95mm2, an inner shielding layer 6 is bonded to the outer side of each conductor 8 through epoxy resin, an inner protective layer 5 is bonded to the outer side wall of each inner shielding layer 6 through epoxy resin, the inner protective layer 5 is bonded to the insulating layer 2, an outer shielding layer 7 is arranged on the outer side wall of the insulating layer 2, an outer protective layer 3 is arranged on the outer side wall of the outer shielding layer 7, and an anti-interference layer 4 is arranged on the;
a preparation method of a soft conductor double-shielding anti-interference cable comprises the following steps:
the method comprises the following steps: smelting electrolytic copper, and continuously casting and rolling to obtain an electrolytic copper rod with the diameter of 8.0 mm;
step two: drawing, annealing and tinning a phi 8.0mm electrolytic copper rod to prepare a phi 2.52mm soft copper wire;
step three: bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm into a conductor with the outer diameter of 12.7mm and the diameter of 95mm 2;
step four: the insulating layer 2 and the inner shielding layer 6 form an insulating shielding layer, and an extrusion die is adopted;
step five: an inner shielding layer 6 with the outer diameter of 21.8mm and formed by wrapping an oxygen-free soft copper belt with the thickness of 0.10mm and the width of 19mm in the insulating shielding layer;
step six: wrapping a blocking layer with the thickness of 0.20mm and the width of 35mm outside the insulating shielding layer to form an outer shielding layer 7 with the outer diameter of 60.8 mm;
step seven: then longitudinally wrapping an aluminum-plastic composite belt with the thickness of 0.20mm and the width of 80mm on the barrier layer, and then extruding a polyethylene moisture barrier layer with the thickness of 1.2 mm;
step eight: then wrapping an outer protective layer 3 with the thickness of 0.2mm at the gap outside the moisture barrier layer;
step nine: finally, extruding a thermoplastic anti-interference layer 4 of halogen-free low-smoke anti-ultraviolet waterproof and oilproof polyolefin with the thickness of 2.0mm outside the outer protective layer 3;
step ten: and finally, checking and warehousing qualified products.
The preparation method of the outer protective layer 3 and the inner protective layer 5 comprises the following steps:
s1: placing polyurethane rubber and tetramethyl thiuram disulfide in corresponding weight parts in an internal mixer, internally mixing for 10-15 min at 89 ℃, and vulcanizing to obtain a rubber mixed solution;
s2: adding polyvinyl chloride with corresponding weight parts into the rubber mixed solution, raising the temperature to 105 ℃, carrying out banburying for 3-5 min, keeping the temperature at 110 ℃, adding dihexyl phthalate, butyl stearate, liquid silica gel and antioxidant with corresponding weight parts, continuing banburying for 3-5 min, and extruding by a screw extruder to obtain the protective layer.
In the invention, three layers of shielding signals are divided, wherein the first layer is an anti-interference layer 4 outside an outer protective layer 3 to shield most external signals and effectively reduce the interference of the external signals on internal signals, the second layer is an outer shielding layer 7 between the outer protective layer 3 and an insulating layer 2 to shield external signals which enter the cable through the outer protective layer 3 and are not shielded by the anti-interference layer 4 and protect the internal signals from the interference of the external signals, the third layer is an inner shielding layer 6 outside a conductor 8 to prevent transmission signals inside the conductor 8 from diffusing to the outside, so that the internal transmission signals are strong, the three layers of synergistic action ensures that the cable has strong anti-interference signal capability, can effectively prevent the diffusion of internal transmission signals and avoid the mutual interference among the conductors 8, and can prevent the interference of external signal to internal signal, inner core 1 has strengthened the ability of cable transmission signal, has avoided the cable to receive the interference of external signal.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The utility model provides a two shielded anti-interference cables of soft conductor, includes insulating layer (2), its characterized in that, the center department of insulating layer (2) is provided with inner core (1), inner core (1) is provided with well core protective layer (9) outward, well core protective layer (9) bond in insulating layer (2), the peripheral equidistant ring of inner core (1) is listed as and has a plurality of conductors (8), every the outside of conductor (8) all bonds through epoxy and has inner shield layer (6), the lateral wall on inner shield layer (6) all bonds through epoxy has inner shield layer (5), bond between inner shield layer (5) and insulating layer (2), be provided with outer shielding layer (7) on the lateral wall of insulating layer (2).
2. The flexible conductor double-shielded anti-interference cable according to claim 1, wherein an outer protective layer (3) is disposed on an outer side wall of the outer shielding layer (7), and an anti-interference layer (4) is disposed on an outer side wall of the outer protective layer (3).
3. The double shielded anti-interference cable according to claim 1, wherein the copper conductor (8) is formed by stranding 19 tinned soft copper wires with a diameter of 2.52mm, and has an outer diameter of 12.7mm and a cross section of 95mm 2.
4. The method for preparing the flexible conductor double-shielded anti-interference cable according to claim 1 or 3, characterized by comprising the following steps:
the method comprises the following steps: smelting electrolytic copper, and continuously casting and rolling to obtain an electrolytic copper rod with the diameter of 8.0 mm;
step two: drawing, annealing and tinning a phi 8.0mm electrolytic copper rod to prepare a phi 2.52mm soft copper wire;
step three: bundling and stranding 19 tinned soft copper wires with the diameter of 2.52mm into a conductor with the outer diameter of 12.7mm and the diameter of 95mm 2;
step four: the insulating layer (2) and the inner shielding layer (6) form an insulating shielding layer, and an extrusion die is adopted;
step five: an inner shielding layer (6) which is formed by oxygen-free soft copper belts with the thickness of 0.10mm and the width of 19mm and has the outer diameter of 21.8mm is wrapped in the insulating shielding layer;
step six: wrapping a blocking layer with the thickness of 0.20mm and the width of 35mm outside the insulating shielding layer to form an outer shielding layer (7) with the outer diameter of 60.8 mm;
step seven: then longitudinally wrapping an aluminum-plastic composite belt with the thickness of 0.20mm and the width of 80mm on the barrier layer, and then extruding a polyethylene moisture barrier layer with the thickness of 1.2 mm;
step eight: then an outer protective layer (3) with the thickness of 0.2mm is wound at the gap outside the moisture barrier layer;
step nine: finally, extruding a thermoplastic anti-interference layer (4) of halogen-free low-smoke anti-ultraviolet waterproof and oilproof polyolefin with the thickness of 2.0mm outside the outer protective layer (3);
step ten: and finally, checking and warehousing qualified products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911064527.XA CN110752055A (en) | 2019-11-04 | 2019-11-04 | Flexible conductor double-shielding anti-interference cable and preparation method thereof |
Applications Claiming Priority (1)
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