CN204720213U - A kind of broadband electromagnetical shield sheath - Google Patents
A kind of broadband electromagnetical shield sheath Download PDFInfo
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- CN204720213U CN204720213U CN201520472870.9U CN201520472870U CN204720213U CN 204720213 U CN204720213 U CN 204720213U CN 201520472870 U CN201520472870 U CN 201520472870U CN 204720213 U CN204720213 U CN 204720213U
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Abstract
The utility model discloses a kind of broadband electromagnetical shield sheath, comprising: insulating barrier, screen, earth connection and fastener; Screen is wrapped in outside insulating barrier and earth connection, earth connection and screen electrical contact, and the two ends of screen are also provided with fastener; Described insulating barrier is fiber fabric layer; Described screen comprises at least one deck metallized fabrics layer, and described metallized fabrics layer comprises base fabrics layer and metal level, and described metal level is silver metal layer, tin/copper bi-metal layer, nickel/copper bi-metal layer or dilval/copper bi-metal layer; Described screen also scribbles ageing-resistant coating outward.The utility model is using metallized fabrics as screen, at the material such as polyester, nylon fabric face metal lining, realize wideband shield effectiveness by the composition and structure regulating metal level, shielding frequency range is wide, screening effectiveness is good, and can increase ageing-resistant performance through coating process.
Description
Technical field
The utility model relates to a kind of broadband electromagnetical shield sheath.
Background technology
In the systems such as automobile, train, boats and ships, there is a large amount of wire harness, be made up of one or more cable, play the functions such as power supply, control, induction, transfer of data, these wires are meeting radiated electromagnetic wave in transmission current or signal process, and simultaneous transmission of signals also can be subject to the interference of external electromagnetic radiation.The topmost method solving electromagnetic radiation and electromagnetic interference adopts electromagnetic shielding material cable or wire harness to be wrapped up, such material mainly contains shielded type cable, shielding heat-shrink tube, shielding tape and shield sheath etc. at present, be compared to other shielding materials, shield sheath have easy to use, cost is low, easy maintenance, the advantage such as reusable.
Shield sheath primarily of insulating barrier, screen, earth connection and fastener four part composition, insulating barrier mainly plays defencive function, at present main with polyester fiber, nylon fiber braiding form, or adopt PVC material; Screen plays reflection electromagnetic wave to reach the object suppressing electromagnetic radiation and electromagnetic interference, mainly uses the materials such as aluminium foil, braided metal net, copper nickel conductive fabric at present; Earth connection, by being connected with the ground wire of system, can realize electromagnetic compatibility better, at present main use braided metal line and wire belt, and material mostly is tin-coated copper; Fastener is used for the installation of shield sheath, is connected on sheath both sides, is rolled into tubulose, uses self-thread gluing (Velcro), snap-fastener, slide fastener, two-sided tape or other securing members.The shield sheath proposed as US Patent No. 7235737 namely with copper mesh grid for shielded conductor, skin be thermoplastic plastics belt, and the shield sheath proposed in United States Patent (USP) 5391838 is screen with wire netting, take PVC as insulating barrier, the installation of employing slide fastener.The reinforced shield sheath proposed in Chinese patent 201220296828.2 weaves netting twine for screen with aluminium foil, tin-coated copper.
The subject matter that prior art exists is narrow in shielding frequency range, in prior art, screen adopts electric screen technology, namely the reflection to electromagnetic field is realized by the material of low-resistivity, and at low-frequency band, particularly at below 1MHz, wavelength is very long, in the general shielding material thickness used, be difficult to usable reflection electromagnetic wave, the magnetic material of tool must be used, the reflection to electromagnetic field could be realized by magnetic screen.And for frequency electromagnetic waves, wavelength is very short, due to the wire gap that metal net exists, screening effectiveness is poor.
Utility model content
The advantages such as solving the problems of the technologies described above, the utility model provides a kind of broadband electromagnetical shield sheath, and it is wide that it has shielding frequency range, ageing-resistant, can be applied to automobile, train, shipbuilding industry, solve electromagnetic shielding problem that is single or multi-cable.
To achieve these goals, the utility model adopts following technical scheme.
A kind of broadband electromagnetical shield sheath, comprising: insulating barrier, screen, earth connection and fastener; Screen is wrapped in outside insulating barrier and earth connection, earth connection and screen electrical contact, and the two ends of screen are also provided with fastener; Described insulating barrier is fiber fabric layer, and the fabric of described fiber fabric layer can be polyester fiber or nylon fiber; Described screen comprises at least one deck metallized fabrics layer, and described metallized fabrics layer comprises base fabrics layer and metal level, and described metal level is silver metal layer, tin/copper bi-metal layer, nickel/copper bi-metal layer or dilval/copper bi-metal layer; Described screen also scribbles ageing-resistant coating outward.
In the utility model, in iron nickel/copper double-decker, iron content is 0-0.85.
The main utility model point of the utility model is the screen used in shield sheath, adopts one layer metallization fabric or multilevel metallization fabric compound, realizes broadband electromagnetical shielding properties.
The metallized fabrics used in the utility model also can through coating process to increase its ageing-resistant performance.
The utility model, using metallized fabrics as screen, at the material such as polyester, nylon fabric face metal lining, realizes wideband shield effectiveness by the composition and structure regulating metal level.Wherein metal level can be the metal level such as plating ferronickel/copper double-decker, tin/copper double-decker, silver, and the double-deck metal level of plating ferronickel/copper, realizes low-frequency band capability of electromagnetic shielding; Use plating tin/copper double-decker, silver metal layer realize high frequency band capability of electromagnetic shielding, also can use the multi-layer compound structure of the metallized fabrics with different metal layer, realize broadband electromagnetical shielding properties.
The beneficial effects of the utility model are, using metallized fabrics as screen, at the material such as polyester, nylon fabric face metal lining, wideband shield effectiveness is realized by the composition and structure that regulate metal level, shielding frequency range is wide, screening effectiveness is good, and can increase ageing-resistant performance through coating process.
Certainly, implement arbitrary product of the present utility model might not need to reach above-described all advantages simultaneously.
Accompanying drawing explanation
Fig. 1 is broadband electromagnetical shield sheath overall structure schematic diagram.
Fig. 2 is a kind of shielding layer structure schematic diagram.
Fig. 3 is alternative shielding layer structure schematic diagram.
Fig. 4 is the screening effectiveness figure of wideband shield sheath.
Wherein, 1, fastener; 2, screen; 3, insulating barrier; 4, earth connection; 5, ageing-resistant coating; 6, the first metal layer; 7, the second metal level; 8, base fabrics layer.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, a kind of broadband electromagnetical shield sheath, comprising: insulating barrier 3, screen 2, earth connection 4 and fastener 1; Screen 2 is wrapped in outside insulating barrier 3 and earth connection 4, earth connection 4 and screen 2 electrical contact, and the two ends of screen 2 are also provided with fastener 1; Described screen 2 is individual layer or multilevel metallization tissue layer.
As shown in Figure 2, described metallized fabrics layer comprises base fabrics layer 8 and the first metal layer 6, and the first metal layer 6 is plated on the surface of base fabrics layer 8, and the surface of the first metal layer 6 applies ageing-resistant coating 5 again.The metal of the first metal layer 6 is silver.
As shown in Figure 3, described metallized fabrics layer comprises base fabrics layer 8, second metal level 7 and the first metal layer 6, and the first metal layer 6, second metal level 7 is plated on base fabrics layer 8 surface, and surface applies ageing-resistant coating 5 again.The metal of the second metal level 7 is copper, and the metal of the first metal layer 6 is tin, nickel or dilval.
Fig. 4 is the screening effectiveness figure of wideband shield sheath.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection range of the present utility model.
Claims (1)
1. a broadband electromagnetical shield sheath, comprising: insulating barrier, screen, earth connection and fastener; Screen is wrapped in outside insulating barrier and earth connection, earth connection and screen electrical contact, and the two ends of screen are also provided with fastener; It is characterized in that, described insulating barrier is fiber fabric layer; Described screen comprises at least one deck metallized fabrics layer, and described metallized fabrics layer comprises base fabrics layer and metal level, and described metal level is silver metal layer, tin/copper bi-metal layer, nickel/copper bi-metal layer or dilval/copper bi-metal layer; Described screen also scribbles ageing-resistant coating outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520472870.9U CN204720213U (en) | 2015-06-30 | 2015-06-30 | A kind of broadband electromagnetical shield sheath |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520472870.9U CN204720213U (en) | 2015-06-30 | 2015-06-30 | A kind of broadband electromagnetical shield sheath |
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| CN204720213U true CN204720213U (en) | 2015-10-21 |
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| CN201520472870.9U Active CN204720213U (en) | 2015-06-30 | 2015-06-30 | A kind of broadband electromagnetical shield sheath |
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Cited By (2)
| 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 |
| CN111093353A (en) * | 2019-12-10 | 2020-05-01 | 中国航空工业集团公司成都飞机设计研究所 | Light flexible high-efficiency wire harness electromagnetic shielding sleeve |
-
2015
- 2015-06-30 CN CN201520472870.9U patent/CN204720213U/en active Active
Cited By (2)
| 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 |
| CN111093353A (en) * | 2019-12-10 | 2020-05-01 | 中国航空工业集团公司成都飞机设计研究所 | Light flexible high-efficiency wire harness electromagnetic shielding sleeve |
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