CN208873515U - A kind of electromagnetic shielded cable - Google Patents
A kind of electromagnetic shielded cable Download PDFInfo
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- CN208873515U CN208873515U CN201821504796.4U CN201821504796U CN208873515U CN 208873515 U CN208873515 U CN 208873515U CN 201821504796 U CN201821504796 U CN 201821504796U CN 208873515 U CN208873515 U CN 208873515U
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- electromagnetic
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- copper mesh
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Abstract
The utility model discloses a kind of electromagnetic shielded cables, including the electrostatic screen layer being wrapped in outside core wire and sheath, its main feature is that electrostatic screen layer is externally provided with the Bimetallic shielding structure of electromagnetic shielding metal layer and copper mesh layers one, the electromagnetic shielding metal layer is the silverskin being arranged in polyimides base；The copper mesh layers are the gauze screen that double helix copper sheet is wrapped on electromagnetic shielding metal layer；The sheath is the protective layer being arranged in outside copper mesh layers.The utility model has structure simple compared with prior art, easy to process, light-weight, and the good advantage of electromagnetic protection effect greatly avoids the transmission of outside electromagnetic interference internal signal, further improves cable for the performance of electromagnetic wave shielding.
Description
Technical field
The utility model relates to technical field of cable, bimetallic of specifically a kind of copper mesh in conjunction with silver layer is anti-
The electromagnetic shielded cable of shield.
Background technique
Electromagnetic compatibility is both to utilize metal screen layer plus metal screen layer in the outside of common unmasked wiring system
Reflection, absorption and skin effect realize that the function of preventing electromagnetic interference and electromagnetic radiation, shielding harness fully utilize twisted pair
Equilibrium principle and shielded layer shielding action, thus have extraordinary electromagnetic compatibility characteristic, must for good electromagnetic shielding
Must be an entire shield surface must be it is conductive continuous, the other is cannot have the conductor for being directed through shield.Metal
Electric conductivity is better, and shield effectiveness is also better, and experiment shows that frequency is more than that the electromagnetic wave of 5MHz can only penetrate the aluminium of 38 μ m-thicks
Foil just allows to the frequency for entering the electromagnetic interference inside cable through shielded layer if the thickness of shielded layer is allowed to be more than 38 μm
Mainly in 5MHz or less.
The shielded layer of the cable of the prior art generally is braiding copper mesh or copper pool (aluminium) surface continuity energy and ductility
Can be poor, there are many conductive discontinuity poinies, the especially non-conductive gap of different piece junction formation on shield, leverages
Electromagnetic energy flow is reflected, absorbed and is guided, anti-interference and shield effectiveness is poor.
Utility model content
The purpose of this utility model be in view of the deficiencies of the prior art and provide a kind of electromagnetic shielded cable, using polyamides
The silver layer growth technique of imines forms fine and close silverskin and copper mesh outside core wire and constitutes dual electromagnetic armouring structure, realizes more
Good ELECTROMAGNETIC REFLECTION, greatly avoids the transmission of outside electromagnetic interference internal signal, electromagnetic protection effect is good, avoids between cable
It interferes with each other, connection is simple between each other, further improves cable for the performance of electromagnetic wave shielding, and structure is simple, processing
Convenient, light-weight, the metallic silver all standing of core wire has preferable electric conductivity and ductility, and Earthing Reliability is high, can be preferable
Completion electromagnetic shielding task.
Technical scheme of realizing the purpose of the utility model is that a kind of electromagnetic shielded cable, including be wrapped in outside core wire
Electrostatic screen layer and sheath, its main feature is that electrostatic screen layer be externally provided with electromagnetic shielding metal layer and copper mesh layers one bimetallic
Shielding construction, the electromagnetic shielding metal layer is the silverskin being arranged in polyimides base；The copper mesh layers are double helix copper
Piece is wrapped in the gauze screen on electromagnetic shielding metal layer；The sheath is the protective layer being arranged in outside copper mesh layers.
The utility model has stronger ELECTROMAGNETIC REFLECTION performance compared with prior art, and it is dry greatly to avoid external electromagnetic
The transmission of internal signal is disturbed, electromagnetic protection effect is good, avoids interfering with each other between cable, and connection is simple between each other, further
Cable is improved for the performance of electromagnetic wave shielding, structure is simple, and easy to process, light-weight, Earthing Reliability is high.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Specific embodiment
Refering to 1 ~ Fig. 2 of attached drawing, the utility model by set gradually outside core wire 1 electrostatic screen layer 2, polyimides base 3,
It is electromagnetically shielded metal layer 4, copper mesh layers 5 and sheath 6 to form, the electrostatic screen layer 2 is externally provided with electromagnetic shielding metal layer 4 and copper mesh
The Bimetallic shielding structure that layer 5 is integrated, the electromagnetic shielding metal layer 4 is the silverskin being arranged in polyimides base 3；Institute
Stating copper mesh layers 5 is the metallic shield net that double helix copper sheet is wrapped on electromagnetic shielding metal layer 4；The sheath 6 is to be arranged in copper
Protective layer outside stratum reticulare 5.
The utility model is performed such double electromagnetic shielding:
(1), electrostatic screen
Fine and close electromagnetic shielding metal layer 4 will charge entirety and wrap up, and will incude in the inside of electromagnetic shielding metal layer 4
Out with the opposite charges of energized conductor equivalent, there are the identical charges with energized conductor equivalent in outside, if will electromagnetic shielding gold
Belong to layer 4 to be grounded, then the identical charges in outside will flow into the earth, and outside will not be with the presence of electric field, i.e. the electric field quilt of energized conductor
Shielding completes electrostatic screen in electromagnetic shielding metal layer 4.
(2), alternating electric field shields
The electromagnetic shielding metal layer 4 of good conductivity is set between interference source and core wire 1, and metal layer 4 will be electromagnetically shielded
Ground connection, can make alternating electric field become very little to the coupled interference voltage of sensitive circuit, and electric field shielding is shielded based on reflecting
The thickness for covering body need not be excessive, and using structural strength as major consideration, the electromagnetic screen of silver layer is grown with polyimides base 3
The requirement of electric field shielding can be fully met by covering metal layer 4.
(3), alternating magnetic field shields
The magnetic conductivity of shield is higher, thickness is bigger, magnetic resistance is smaller, and the effect of magnetic field shielding is better, metallic shield silver layer
4 magnetic conductivity is very high, and thickness can be grown according to the time, and mutually coordinates with the weight of core wire 1, completes alternating electromagnetic field shielding
Effect.
(4), alternating electromagnetic field shields
The conductivity of silver is very high, and electromagnetic shielding metal layer 4 is grounded, and the thickness of silver layer need not be excessive, mainly examines
Consider skin depth and structural strength, generates the vortex magnetic of opposite direction under the action of high frequency magnetic field using electromagnetic shielding metal layer 4
With original magnetic field cancellation and weaken the interference of high frequency magnetic field.
Above to be only further described to the utility model, not to limit this patent, all is the utility model
Equivalence enforcement is intended to be limited solely by within the scope of the claims of this patent.
Claims (1)
1. a kind of electromagnetic shielded cable, including electrostatic screen layer (2) and sheath (6) in core wire (1) outside is arranged, feature is quiet
The Bimetallic shielding layer structure that shield layer (2) is externally provided with electromagnetic shielding metal layer (4) and copper mesh layers (5) combine, the electromagnetism
Shielding metal leve (4) is the silver layer being arranged on polyimides base (3)；The copper mesh layers (5) are that double helix is wrapped in electromagnetism
Shielded layer in shielding metal leve (4)；The sheath (6) is the setting protective layer external in copper mesh layers (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821504796.4U CN208873515U (en) | 2018-09-14 | 2018-09-14 | A kind of electromagnetic shielded cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821504796.4U CN208873515U (en) | 2018-09-14 | 2018-09-14 | A kind of electromagnetic shielded cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208873515U true CN208873515U (en) | 2019-05-17 |
Family
ID=66467725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821504796.4U Active CN208873515U (en) | 2018-09-14 | 2018-09-14 | A kind of electromagnetic shielded cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208873515U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390092A (en) * | 2018-09-14 | 2019-02-26 | 华东师范大学 | A kind of electromagnetic shielded cable and preparation method thereof |
| CN111836531A (en) * | 2020-05-29 | 2020-10-27 | 武汉船用机械有限责任公司 | Electromagnetic radiation shielding device and method for cable |
| CN113838610A (en) * | 2021-10-11 | 2021-12-24 | 国网河北省电力有限公司邢台供电分公司 | Electromagnetic shielding cable for spanning high-speed railway overhead |
-
2018
- 2018-09-14 CN CN201821504796.4U patent/CN208873515U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390092A (en) * | 2018-09-14 | 2019-02-26 | 华东师范大学 | A kind of electromagnetic shielded cable and preparation method thereof |
| CN111836531A (en) * | 2020-05-29 | 2020-10-27 | 武汉船用机械有限责任公司 | Electromagnetic radiation shielding device and method for cable |
| CN113838610A (en) * | 2021-10-11 | 2021-12-24 | 国网河北省电力有限公司邢台供电分公司 | Electromagnetic shielding cable for spanning high-speed railway overhead |
| CN113838610B (en) * | 2021-10-11 | 2024-03-19 | 国网河北省电力有限公司邢台供电分公司 | Electromagnetic shielding cable line crossing high-speed railway overhead |
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