CN2805028Y - Double insulation layer shielded paired stranded conductor - Google Patents
Double insulation layer shielded paired stranded conductor Download PDFInfo
- Publication number
- CN2805028Y CN2805028Y CN 200420095946 CN200420095946U CN2805028Y CN 2805028 Y CN2805028 Y CN 2805028Y CN 200420095946 CN200420095946 CN 200420095946 CN 200420095946 U CN200420095946 U CN 200420095946U CN 2805028 Y CN2805028 Y CN 2805028Y
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- CN
- China
- Prior art keywords
- insulation layer
- screen
- shielded
- stranded conductor
- utility
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- 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.)
- Expired - Fee Related
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Insulated Conductors (AREA)
Abstract
The utility model discloses a double insulation layer shielded paired stranded conductor. The utility model is orderly provided with a core conductor, a shielded layer and an outer insulation layer from inner part to outer part, wherein a ground wire is arranged in the shielded layer and the other insulation layer is arranged between the core conductor and the shielded layer. Because the utility model uses the structure, the structure of a paired stranded conductor pair is protected at maximum, and the deformation of the shielded layer, which is caused by high temperature when the paired stranded conductor is coated with the outer insulation layer, can not influence the paired stranded conductor. Simultaneously, the shielded layer and the core conductor are spaced and the interference of an antenna effect when a shielded system does not contact the ground is prevented. Thus, the utility model has the same high performance and high safety when a nonshielded paired stranded conductor is laid at a sealed metal pipe.
Description
Technical field
The utility model relates to a kind of twisted-pair feeder, is specifically related to a kind of double insulating layer Shielded Twisted Pair.
Background technology
Twisted-pair feeder (TP:Twisted Pairwire) is a kind of transmission medium the most frequently used in the generic cabling engineering.Twisted-pair feeder is made up of two copper conductors with insulating protective layer.Two copper conductors that thoroughly do away with edge are twisted together mutually by certain density, can reduce the degree that signal disturbs, the electric wave that the electric wave of each root lead radiation in transmission can be sent on other single line is offset.Twisted-pair feeder generally is entwined mutually by two 22～No. 26 insulated copper leads.Just become twisted-pair cable if one or more pairs of twisted-pair feeders are placed in the insulating sleeve.In twisted-pair cable (also claiming twisted-pair cable), not collinear in general, lay length is pressed left hand lay in 38.1cm to 14cm to having different lay length, faces the right lay length of line mutually more than 12.7cm.At present, twisted-pair feeder can be divided into unshielded twisted pair (UTP:Unshilded Twisted Pair) and Shielded Twisted Pair (STP:Shielded Twisted Pair).
The formation characteristics of unshielded twisted pair are to be not have other screen between heart yearn and the external insulation sleeve, its benefit is that the performance characteristics of little, in light weight, flexible, the easy installation of cable diameter, twisted-pair feeder is brought into play fully, is applicable to, simultaneously security requirement not high occasion higher to performance requirement.Shielded Twisted Pair is compared with unshielded twisted pair, many 1 to 2 layer of screens between heart yearn and oversheath, and the constituent material of screen can be for aluminium is thin, polyester belt or metal knitted net.Because screen has been arranged, Shielded Twisted Pair just has excellent properties such as stronger antinoise signal leakage, anti-outside electromagnetic interference than unshielded twisted pair, be widely used in the occasion higher, as departments such as government, military unit, bank, factories to the transfer of data security requirement.
Though Shielded Twisted Pair has above advantage,, some negative effects have just been produced after when producing, having had more this procedure because it has screen.The bag screen carries out after heart yearn is to stranding in the production process of Shielded Twisted Pair, wrap screen and entered this procedure of bag external insulation layer again, because what be close to heart yearn generally is the thin or polyester belt of very thin aluminium, it can be subjected to the heat transferred of high temperature polyvinyl chloride (PVC) or polyethylene (PE) when the bag external insulation layer, cause the screen modification to be shunk, the structure and the balance of multiple twin core are destroyed, and then had influence on the electric property of cable.Such result is exactly, Shielded Twisted Pair is when providing better data transmission security, but make electric property parameters such as the prior decay of twisted-pair feeder, characteristic impedance, return loss poorer than unshielded twisted pair, this has caused shielding harness to produce unnecessary dispute when engineering construction.On the other hand, the screen of shielding harness needs ground connection, obtains scientifically ground connection but seldom do when engineering construction, or even earth-free.This can produce another phenomenon again, equipment such as extraneous power, illumination, fan, control all can produce electromagnetic radiation, and the screen of earth-free Shielded Twisted Pair has all received (antenna effect) to various interference signals with regard to image antenna is the same, and promptly interfere with electromagnetic field produces on cable and disturbs induced current.This disturbs induced current also will produce interference inductive voltage on the cable shield longitudinal electrical resistance, under the situation of normal ground connection, this voltage can flow into the earth, but in nonstandard engineering construction, this induced voltage forms normal network signal transmission and disturbs, based on this reason, there is not the shielding harness performance of ground connection often poorer than non-shielding harness.
Summary of the invention
The purpose of this utility model is at the problems referred to above, and a kind of double insulating layer Shielded Twisted Pair is provided, to solve the weak point of existing Shielded Twisted Pair.
The technical solution of the utility model is as follows: the double insulating layer Shielded Twisted Pair, be provided with heart yearn, screen and external insulation layer from the inside to the outside successively, and be provided with ground wire in the screen, be provided with another insulating barrier between described heart yearn and the screen.
Above-mentioned heart yearn is made up of four pairs of twisted-pair feeders.
Above-mentioned screen is 1～2 layer.
Above-mentioned screen is that aluminium is thin, polyester belt or metal knitted net.
The utility model is owing to adopt said structure, and right structure obtains maximized protection to make twisted-pair feeder, and its screen that causes because of high temperature when wrapping external insulation layer distortion also can not impact it; Simultaneously screen and heart yearn are separated the interference of antenna effect when having avoided shielding harness not have ground connection.Therefore, it has unshielded twisted pair the same high-performance and high security when being laid on airtight metal tube.
Description of drawings
Fig. 1 is a sectional structure schematic diagram of the present utility model.
Now the utility model is described in further detail in conjunction with the accompanying drawings and embodiments:
Embodiment
As shown in Figure 1, double insulating layer Shielded Twisted Pair described in the utility model is provided with heart yearn 1, one deck screen 3 and the external insulation layer of being made up of four pairs of twisted-pair feeders 4 from the inside to the outside successively, is provided with another insulating barrier 2 between heart yearn 1 and the screen 3.Screen 3 can be that aluminium is thin, polyester belt or metal knitted net, is provided with ground wire 5 in it.
Claims (4)
1, double insulating layer Shielded Twisted Pair is provided with heart yearn, screen and external insulation layer from the inside to the outside successively, is provided with ground wire in the screen, it is characterized in that: be provided with another insulating barrier between described heart yearn and the screen.
2, double insulating layer Shielded Twisted Pair according to claim 1 is characterized in that: described heart yearn is made up of four pairs of twisted-pair feeders.
3, double insulating layer Shielded Twisted Pair according to claim 1 is characterized in that: described screen is 1～2 layer.
4, according to claim 1 or 3 described double insulating layer Shielded Twisted Pairs, it is characterized in that: described screen is that aluminium is thin, polyester belt or metal knitted net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095946 CN2805028Y (en) | 2004-12-02 | 2004-12-02 | Double insulation layer shielded paired stranded conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095946 CN2805028Y (en) | 2004-12-02 | 2004-12-02 | Double insulation layer shielded paired stranded conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2805028Y true CN2805028Y (en) | 2006-08-09 |
Family
ID=36910313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420095946 Expired - Fee Related CN2805028Y (en) | 2004-12-02 | 2004-12-02 | Double insulation layer shielded paired stranded conductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2805028Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554411A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device for electric welding machine |
| CN102554410A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device of electric welding machine |
-
2004
- 2004-12-02 CN CN 200420095946 patent/CN2805028Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554411A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device for electric welding machine |
| CN102554410A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device of electric welding machine |
| CN102554411B (en) * | 2012-01-20 | 2014-10-29 | 左敬民 | Electric shock prevention device for electric welding machine |
| CN102554410B (en) * | 2012-01-20 | 2015-05-20 | 左敬民 | Electric shock prevention device of electric welding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060809 Termination date: 20100104 |