CN219321091U - Anti-interference video coaxial cable - Google Patents
Anti-interference video coaxial cable Download PDFInfo
- Publication number
- CN219321091U CN219321091U CN202320718570.9U CN202320718570U CN219321091U CN 219321091 U CN219321091 U CN 219321091U CN 202320718570 U CN202320718570 U CN 202320718570U CN 219321091 U CN219321091 U CN 219321091U
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- CN
- China
- Prior art keywords
- layer
- coaxial cable
- video coaxial
- thermoplastic resin
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004020 conductor Substances 0.000 claims abstract description 24
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 21
- 238000001125 extrusion Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 9
- 238000005253 cladding Methods 0.000 claims description 8
- 239000004812 Fluorinated ethylene propylene Substances 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims description 6
- 229920009441 perflouroethylene propylene Polymers 0.000 claims description 6
- 229920006267 polyester film Polymers 0.000 claims description 3
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 241000784732 Lycaena phlaeas Species 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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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
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- Insulated Conductors (AREA)
Abstract
The utility model discloses an anti-interference video coaxial wire and cable, which comprises a conductor, an insulating layer, a braided shielding layer, a magnetic thermoplastic resin extrusion layer, a wrapping belt and an outer sheath, wherein the insulating layer is coated outside the conductor, the braided shielding layer is arranged around the insulating layer, the magnetic thermoplastic resin extrusion layer is coated outside the braided shielding layer, the wrapping belt is coated outside the magnetic thermoplastic resin extrusion layer, and the outer sheath is coated outside the wrapping belt. The utility model can improve the anti-interference performance of the cable and ensure the softness.
Description
Technical Field
The utility model relates to a cable, in particular to an anti-interference video coaxial cable.
Background
The wire and cable connection equipment, the user and the power supply are indispensable components of the communication system, and electromagnetic interference signals superposed on the wire and cable connection equipment are directly conducted into the equipment, so that various interferences to normal operation and even damage to the equipment are caused. The anti-interference measures of the electric wires and the cables mainly adopt shielding, grounding and isolation, the common anti-interference measures are that shielding layers are adopted, the shielding layers made of the same materials as the conductors are arranged outside the insulators, so that the influence of electromagnetic force is absorbed by the shielding layers, and the anti-interference strength depends on the shielding rate of the shielding layers. The higher the shielding rate is, the better the anti-interference effect is. In order to achieve good anti-interference effect, a large number of copper wires are required and the shielding pitch is reduced. Meanwhile, in order to work in a more complex environment, the cable adopts double-layer shielding and a magnetic ring is sleeved on the cable to enhance the anti-interference effect. Thereby increasing costs and reducing production efficiency and stiffening the cable.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides an anti-interference video coaxial cable, which aims to improve the anti-interference strength of the coaxial cable and maintain the softness of the cable.
The technical scheme of the utility model is as follows: the utility model provides an anti-interference video coaxial cable, includes conductor, insulating layer, braided shield layer, magnetism thermoplasticity resin extrusion layer, band and oversheath, the insulating layer cladding is in outside the conductor, braided shield layer is around the insulating layer sets up, magnetism thermoplasticity resin extrusion layer cladding is in outside the braided shield layer, the band cladding is in outside the magnetism thermoplasticity resin extrusion layer, the oversheath cladding is in outside the band.
Further, the wrapping tape is aluminum foil wrapping tape.
Further, the aluminum foil wrapping tape is formed by attaching aluminum foil and a polyester film.
Further, the magnetic thermoplastic resin extrusion layer is extruded from a magnetic PVC material.
Further, the shielding rate of the braided shielding layer is more than 95%, and the number of braided meshes is more than 15.
Further, the conductor is a silver-plated copper conductor.
Further, the insulating layer is made of foaming cross-linked PE material.
Further, the outer sheath is made of fluorinated ethylene propylene copolymer.
The technical scheme provided by the utility model has the advantages that:
the utility model adopts the magnetic thermoplastic resin extrusion layer as the second shielding layer, and utilizes the magnetic field characteristics similar to the magnetic ring formed by the magnetic thermoplastic resin extrusion layer to make electromagnetic waves inside and outside the cable generate mutual offset effect so as to achieve the shielding effect. Meanwhile, the magnetic thermoplastic resin extrusion layer is coated on the whole cable, so that the whole anti-shielding performance of the cable is improved, and a softer cable can be obtained compared with the two layers of braided shielding layers, so that the anti-interference capability of the electric wire and the cable is high, the cable is suitable for various severe environments, and the cost is reduced.
Drawings
Fig. 1 is a schematic cross-sectional structure of an anti-interference video coaxial cable of an embodiment.
Fig. 2 is a schematic structural diagram of an anti-interference video coaxial cable according to an embodiment.
Detailed Description
The present utility model is further described below with reference to examples, which are to be construed as merely illustrative of the present utility model and not limiting of its scope, and various modifications to the equivalent arrangements of the present utility model will become apparent to those skilled in the art upon reading the present description, which are within the scope of the appended claims.
Referring to fig. 1 and 2, the anti-interference video coaxial cable of the present embodiment includes, from inside to outside, a conductor 1, an insulating layer 2, a braided shielding layer 3, a magnetic thermoplastic resin extrusion layer 4, a tape 5 and an outer sheath 6.
In this embodiment, the conductor 1 is a single solid silver-plated copper conductor, and because the current is actually small inside the conductor 1, the current is concentrated in a thin layer adjacent to the outer surface of the conductor, and as a result, the resistance thereof increases. And the resistance of the conductor 1 increases so that its loss power increases. The center of the common copper conductor is only suitable for transmitting medium-low frequency (frequency below 5000 Hz) signals, the surface of the common copper conductor is suitable for transmitting high-frequency (frequency above 5000 Hz) signals, and the common copper conductor does not interfere with each other between the high frequency and the low frequency, but at the moment, the high frequency and the low frequency signals are not even when being transmitted, so that different effects on high frequency performance are caused. The silver-plated copper adopted in the embodiment is used as the conductor 1, the middle is favorable for transmitting low and medium frequency, and the surface silver layer is favorable for transmitting high frequency. And the chemical property of silver is more stable than copper, so that the high-frequency transmission property of silver is better than that of copper, and the high-frequency parameter can be improved. Of course, materials such as bare copper, tin-plated copper and the like can be selected according to actual needs. In some particular embodiments, stranded conductor strands may also be used to increase the mechanical strength of the cable.
The insulating layer 2 wraps the conductor 1 to perform an insulating function, and in this embodiment, the insulating layer 2 is made of foamed and crosslinked PE. The traditional cable insulating layers are made of PE or FEP, and the two materials are low in insulating dielectric coefficient, so that high-frequency loss can be reduced, and transmission efficiency can be improved. However, the PE insulation is not resistant to high temperature and cannot be used in a high temperature environment, and the FEP can meet the high temperature and low temperature requirements, but is expensive.
Compared with the common PE, the foaming crosslinking PE not only improves the comprehensive properties such as mechanical property, environmental stress cracking resistance, chemical corrosion resistance, creep resistance, electrical property and the like, but also obviously improves the temperature resistance grade, and the heat resistance temperature is improved to more than 150 ℃ from 70 ℃. Compared with the unfoamed material, the foaming crosslinking PE has the characteristics of high and low temperature resistance, corrosion resistance and the like of XLPE, and can save about 60 percent of materials, so that the weight of wires is reduced, the wire diameter is relatively reduced, and the cost is reduced.
The braided shielding layer 3 is arranged outside the insulating layer 2, the braided conductor is bare copper, the shielding rate is above 95%, and the braiding mesh number is above 15, so that the internal core wires are tightly wrapped, and the influence of an external electric field and a magnetic field is effectively prevented.
The magnetic thermoplastic resin extrusion layer 4 is obtained by extruding magnetic thermoplastic resin outside the woven shielding layer 3, wherein the main components of the magnetic thermoplastic resin are ferrite magnetic powder, thermoplastic resin (PVC is used as the thermoplastic resin at present), a small amount of antioxidant, plasticizer and the like, and the magnetic thermoplastic resin is prepared by mixing and granulating by a mixer. Ferrite pellets for extrusion molding have excellent magnetic properties, mechanical strength and high temperature resistance. The material characteristics are like magnetic rings, and electromagnetic waves inside and outside the cable are mutually counteracted by utilizing the magnetic field characteristics, so that the shielding effect is achieved. But the difference is that the magnetic ring is only sleeved at a certain position of the cable, and the ferrite magnetic material is coated on the whole cable, so that the anti-interference performance of the wire is greatly improved.
The magnetic thermoplastic resin extrusion layer 4 is externally coated with a wrapping tape 5, the wrapping tape 5 uses a high Wen Maila-resistant aluminum foil, the Mylar aluminum foil mainly uses a metal aluminum foil as a base material, and the magnetic thermoplastic resin extrusion layer is formed by laminating PET polyester films after back gluing, so that the magnetic thermoplastic resin extrusion layer has the function of eliminating electromagnetic interference.
The outer sheath 6 is extruded outside the wrapping tape 5, and the outer sheath 6 is made of FEP (fluorinated ethylene propylene copolymer), so that the FEP has excellent performance, has the functions of oil resistance, hydrolysis resistance, corrosion resistance, high temperature resistance and the like, and is more suitable for severe environments.
Claims (8)
1. The utility model provides an anti-interference video coaxial cable, its characterized in that includes conductor, insulating layer, braided shield layer, magnetism thermoplastic resin extrusion layer, band and oversheath, the insulating layer cladding is in outside the conductor, braided shield layer centers on the insulating layer sets up, magnetism thermoplastic resin extrusion layer cladding is in outside the braided shield layer, the band cladding is in outside the magnetism thermoplastic resin extrusion layer, the oversheath cladding is in outside the band.
2. The tamper resistant video coaxial cable of claim 1 wherein the tape is aluminum foil tape.
3. The anti-interference video coaxial cable according to claim 2, wherein the aluminum foil tape is formed by attaching an aluminum foil to a polyester film.
4. The tamper resistant video coaxial cable of claim 1 wherein the magnetic thermoplastic resin extrusion layer is extruded from a magnetic PVC material.
5. The anti-interference video coaxial cable according to claim 1, wherein the shielding rate of the braided shielding layer is 95% or more and the number of braids is 15 or more.
6. The tamper resistant video coaxial cable of claim 1 wherein the conductor is a silver-plated copper conductor.
7. The anti-interference video coaxial cable according to claim 1, wherein the insulating layer is foamed cross-linked PE material.
8. The tamper resistant video coaxial cable of claim 1 wherein the outer jacket is a fluorinated ethylene propylene copolymer material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320718570.9U CN219321091U (en) | 2023-04-04 | 2023-04-04 | Anti-interference video coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320718570.9U CN219321091U (en) | 2023-04-04 | 2023-04-04 | Anti-interference video coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219321091U true CN219321091U (en) | 2023-07-07 |
Family
ID=87026256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320718570.9U Active CN219321091U (en) | 2023-04-04 | 2023-04-04 | Anti-interference video coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219321091U (en) |
-
2023
- 2023-04-04 CN CN202320718570.9U patent/CN219321091U/en active Active
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