CN1624813A - High-speed data cable - Google Patents
High-speed data cable Download PDFInfo
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- CN1624813A CN1624813A CN 200410065818 CN200410065818A CN1624813A CN 1624813 A CN1624813 A CN 1624813A CN 200410065818 CN200410065818 CN 200410065818 CN 200410065818 A CN200410065818 A CN 200410065818A CN 1624813 A CN1624813 A CN 1624813A
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- separation rib
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Abstract
The invention discloses a high speed data cable. It includes sheath and many pairs of cable. Each pair of wire is formed by two insulation cores wires. A separation rib is set in the sheath. And the separation rib is foam structure. The twin is symmetrically set at the both sides of the separation rib. The foam structure is that some dry bubble are uniformly scattered in the section of the separation rib. The surface of the separation rib is concavo convex. The advantages are stable and reliable structure flexible, and easy to bend.
Description
Technical field
The present invention relates to a kind of data cable, especially the carry high frequency digital signal to line group data cable.
Background technology
Along with the fast development of digitizing technique, computer not only is applied in the various industrial plants in large quantities, and obtains popularizing more widely in all kinds of offices even residential building.The continuous expansion of computer network, extension, and the rapid increase of transmission amount of information make to arrange net to increase progressively with bigger amplitude with the data cable consumption on the one hand; Require data cable to have higher transmission speed, wideer transmission bandwidth on the other hand again, to realize quick, the accurately transmission of information.Its transmission speed scope also develops to 1000Mbps from 10Mbps, and can predict because the traffic increasing, network speed will substantially exceed 1000Mbps in the near future, and this can provide a kind of electric property more excellent data cable with regard to an urgent demand people.
The high-performance of data cable again with three important parameters---the good and bad close association of impedance, decay and cross-talk index.At first with regard to impedance, the impedance of data cable further is categorized as characteristic impedance and input impedance, influence to the characteristic impedance or the average impedance of line group cable mainly is subjected to conductor material around dielectric constant, insulated electric conductor and conductor self external diameter also is subjected to the influence of unit length twist number simultaneously; And cable input or actual measurement impedance are subjected to conductor diameter to a great extent, stable in mutual alignment relation and the cable between the line group and certain conductor are associated with the conductor spacing.
Another important parameter that influences the data cable performance is decay, and dielectric constant, the characteristic impedance of conductor and the diameter of conductor that surrounds the conductor insulation material depended in decay; All will cause the variation of input impedance to the mutual alignment spacing of line group structure, conductor, capacitance and pad value depart from its ideal value between conductor, all cause the fluctuation and the decline of cable transmission performance significantly.
Influence data cable, particularly a prior parameter of high-speed data cable performance is a cross-talk.Though to concerning line group data cable, efficient, the accurately transmission of many its signals of factor affecting are arranged, as indexs such as above-mentioned impedance, decay, topmost still cross-talk index is especially under high-speed case.
Cross-talk or title are crosstalked, its expression signal energy loss or the dissipation that coupling between the line group is caused, and cross-talk will become a serious problem along with the increase of frequency.With regard to essence, the essence of cross-talk is that electromagnetic coupled forms the phase mutual interference, electromagnetic coupled can be divided into two big classes, the first kind is called the opportunity electromagnetic coupled, the main cause that forms this class coupling is because inhomogeneities, the asymmetry of structure and all accidentalia such as defective in the technology of cable composed component (as lead, insulating barrier) cause, this class coupling can reduce by regulation and control raw material and structural detail allowable deviation.Another kind of electromagnetic coupled then is called the systematicness coupling, because be because the interactive interference that causes between conductor, to the factors such as physical distance between the line group, it is decided by the mutual alignment between conductor circuit to a great extent, as to line group spacing constant, to stable state of line group position or the like.
Present data cable has generally comprised some to the line group, and the high-speed data cable of standard mostly is to utilize four non-shielding twisted wire cables to line group structure, it is to thoroughly do away with the edge heart yearn with eight, be twisted into four pairs in twos equably to the line group, again with this four couple to line group combination stranding, squeeze into oversheath at last and make finished cable.The relative position between the line group in this cable only depends on cable jacket to be fixed, but when cable laying tractive, bending, the construction of cable self has produced the drawing-off squeezing action, its relative position to the line group can be subjected to displacement and change, even in the cable knitting cycle, its structural parameters also can change.In addition, the fixedly deflation effect of cable jacket can cause mutually nested to the line group, makes one in a pair of line group thoroughly do away with the edge heart yearn and invades in another circumscribed circle space to the line group, and, can cause again line group spatial joint clearance is diminished or can not get rational assurance to the displacement of line group or nested.In a word, the instability of the construction of cable will inevitably cause the deterioration such as performance index such as input impedance, near-end crosstalk, far-end crosstalk and decay, is seriously restricting the raising of data cable operating frequency and data transmission bauds.
In order to improve the transmission performance of available data cable, Chinese patent application (application number 99805867.X) discloses a kind of data cable with crossing skeleton, this crossing skeleton have four protruding and for the solid bulge dividing plate, four solid projection dividing plates are divided into four area of space that hold the line group with space in the oversheath, be equipped with a pair of line group in each zone, thereby make and the line group is maintained fixed the position each other in the cable core, also prevented simultaneously mutually nested to the line group effectively, and to line group surrounding space gap is had certain stabilization.
Yet the high-speed data cable in actual the use requires that not only the line group is had fixing position and stable spatial joint clearance, so that cross-talk reduces to minimum or eliminated; Also requiring data cable should be firm, pliable and tough and easy installation.And have crossing skeleton to line group data cable owing to be projected with cross protruding dividing plate on the skeleton cross section, make skeleton all have higher counter-bending ability on aspect cross section any.This is additional, also be that people do not want the transverse property that needs, exactly make data cable stiff and the very difficult bending that becomes, particularly particularly like this under little knuckle radius situation, lay to the installation of cable and to have brought great difficulty.This adapts to the data cable that various layings are moved towards for needs, is actually a very fatal defective.
Again owing to have size disparity between crossing skeleton external diameter and the cable jacket internal diameter, cause the positioning performance deficiency of crossing skeleton, make skeleton that radially displacement and play takes place in oversheath easily, cause each to take up space not of uniform size or change at random, cause extruding and the drawing-off additional the line group to the line group.These cause the factor of very little geometric position or change of shape, all will cause the rapid decline of high-speed data cable performance.
Also because crossing skeleton adopts solid construction, this solid skeleton has higher dielectric constant, is unfavorable for the reduction to capacitance between the line group, is also restricting the further raising to electric properties such as the impedance of line group, decay.
Summary of the invention
At the above-mentioned deficiency of existing in prior technology, technical problem to be solved by this invention provides a kind of high-speed data cable, and not only the construction of cable is reliable and stable for it, can reduce the electrical Interference between the line group, and cable is pliable and tough, flexible, and laying installation is convenient, and electric property is more excellent.
Another technical problem that will solve of the present invention is to provide a kind of and make the maximized high-speed data cable in line group surrounding air gap.
The another technical problem that will solve of the present invention is to provide a kind of cable external form rounding stable high-speed data cable.
The present invention's technical problem that will solve again is, provide a kind of Cross section Design rationally, to the stable high-speed data cable in line group position.
In order to solve the problems of the technologies described above, high-speed data cable of the present invention comprises oversheath and some to the line group, each is described thoroughly does away with edge heart yearns stranded forming mutually to the line group by two, in described oversheath, be provided with a line group separation rib, this line group separation rib cross section show bubble structure, the described both sides that the line group are positioned over symmetrically line group separation rib.
Owing in cable jacket, be provided with line group separation rib, and the line group be positioned at the both sides of separation rib respectively; This structure has maximized the distance between the line group under the situation that guarantees the outside diameter of cable; The support fixation effect of separation rib makes again line group position is seemed especially stable, can not form displacement and play to the line group, and the construction of cable can keep reliable and stable state; The line group separation rib of enough width also plays a part to prevent the line group mutually nested, helps reducing or avoids mutual intrusion to line group circumscribed circle space.Therefore, this reliable and stable structural shape has been guaranteed the stability of cable parameters, make the operating frequency of cable be improved, message transmission rate is accelerated, for realizing that the cable transmission frequency meets or exceeds 100MHz, transmission rate 1000Mbps reliable assurance is provided.
Also, make that the crooked degree of freedom of cable is bigger, both kept the flexibility of cable, be convenient to cable in various construction and installation of laying under the environment owing to adopt this flat rib-like structure of separation rib; Strengthen the stretch-proof of cable, anti-extrusion ability again, guaranteed the stability of cable length direction structure, improved the robustness of cable, also alleviated the weight of cable.
More because line group separation rib cross section show bubble structure, on cutting, separation rib is scattered with some bubbles equably, thereby reduced the dielectric constant of separation rib, reduced effectively the capacitance between the line group, improved the electric property such as impedance, decay of cable greatly, make the cable electrical performance more excellent, guaranteed the high-speed transfer of signal.
As a kind of preferred structure of the present invention, the surface of line group separation rib is concave-convex, this structure is by maximizing line group ambient air medium, both kept the fixing reliable service position of line group, improve and stablized impedance behavior again, strengthen the antidamping ability, thereby made the electric property of cable better, be more suitable for the high-speed transfer of signal.
As another preferred structure of the present invention, the both side ends of this line group separation rib is equipped with the T-shape camber end face that is connected as a single entity with flank.This structure has further strengthened the support positioning action of separation rib, has both made cable finished product external form rounding, and non-deformability is strong, makes line group position more reliable and stable again; Contact action power between oversheath and the separation rib also becomes evenly rationally, and the structural stability of cable product improves, and non-deformability strengthens, and has played positive role to keeping the good transmission performance of cable.
As the another preferred structure of the present invention, described line group separation rib and oversheath are connected as a single entity and constitute the sheath fin.This disjunctor fin is separated into two independently to line group zone with oversheath, makes can separate fully each other and be fixed on the relevant position the line group, has reduced the electrical Interference between the line group.Reduced cable components quantity simultaneously, be convenient to stranding processing, improved production efficiency line group cable.
As further execution mode of the present invention, the direction of lay to the line group that is positioned at line group separation rib homonymy in this cable is opposite.Have can not meshing physically of suitable opposite direction of lay to the line group; A pair of line group can not invaded in another circumscribed circle space to the line group, thereby has increased the effective horizontal spacing between the line group and keep constant, has reduced coupling between the line group and cross-talk.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments
Fig. 1 is the cross section structure schematic diagram of an embodiment of high-speed data cable of the present invention.
Fig. 2 is the cross section enlarged diagram that high-speed data cable center line group shown in Figure 1 is separated rib structure.
Fig. 3 is the schematic cross-section of the another kind of concrete structure of high-speed data cable center line group separation rib of the present invention.
Fig. 4 is the schematic perspective view of another concrete structure of high-speed data cable center line group separation rib of the present invention.
Fig. 5 is the cross section structure schematic diagram of another embodiment of high-speed data cable of the present invention.
Fig. 6 is the cross section structure schematic diagram of another embodiment of high-speed data cable of the present invention.
Among the figure, 1-oversheath, 2-be to the line group, the 3-heart yearn that insulate, 4-insulating barrier, 5-conductor, 6-line group separation rib, 7-curved end.
Embodiment
A kind of high-speed data cable shown in Figure 1 comprises oversheath 1 and four pairs to line group 2, and each forms so that certain pitch is stranded equably the insulation heart yearn 3 of line group 2 by two different colours.Each eradication edge heart yearn 3 to line group 2 comprises insulating barrier 4 and the copper conductor 5 that is coated in the insulating barrier 4 again.The diameter of conductor 5 shown in Figure 1 is 0.6mm, and insulating barrier 4 thickness are 0.5mm, and the material of insulating barrier 4 is a vinyon, and the material of oversheath 1 also is polyolefin or igelite, and the outside diameter of cable is 7.5mm.
Be provided with a line group separation rib 6 in the oversheath 1, these line group separation rib 6 show bubble flat belt-like rib structures, its length and cable are isometric, and width extends to the inwall of oversheath.At first, it is separated into two zones that can hold the line group with oversheath 1, in two zones up and down of online group of separation rib 6 both sides, all respectively be placed with two pairs symmetrically to line group 2, make four pairs to line group 2 separate coming, realized also having kept data cable respective outer diameter size simultaneously to the line group and to the maximization of distance between the line group; A benefit that increases and fix the distance between the line group is to have improved crosstalk performance, and decay and impedance behavior also have corresponding raising simultaneously.Second, uniformly dispersing has fine and closely woven bubble on line group separation rib 6 cross sections, number of bubbles is gathered, be not communicated with (as shown in Figure 2) each other, thereby formed foamed separation rib structure, this structure reduces the dielectric constant between the line group effectively, reduces the total capacitance value between the line group, not only improve impedance and anti-cross-talk performance, and strengthened the antidamping ability.The 3rd, line group separation rib 6 adopts the flat banded rib structure pattern in cross section, has fabulous pliability again, be easy to bending, be convenient to the cable laying construction, strengthened stretch-proof, the extrusion capability of data cable again, weight is also light, has further improved the stability to line group service position.Therefore, this cross section has the data cable of the flat separation rib structure of bubble, has both had fabulous electricity function index, has ideal flexible again, has taken into account the double requirements of electric property and installation to greatest extent.
Two couple of line group separation rib 6 homonymies is opposite to the direction of lay of line group 2.A pair of direction of lay to the line group is a left-hand, another is a dextrad to the stranded aspect to the line group, thereby eliminated the nested engagement between the line group dangerous fully, keeping reliably the physical distance between the line group, the line group separation rib 6 in flat cross section makes conductor again and to line group ambient air gap maximization in addition, and both comprehensive functions make the line group is fixed in securely and define on the position.The width of line group separation rib 6 is greater than four times of insulation heart yearn external diameter, guarantees and controlled reliable and stable to mutual alignment between the line group 2 and surrounding air gap again.
Realize that by line group separation rib 6 maximization to line group 2 ambient air medium gaps, has strengthened the anti-decay property of cable.Simultaneously, line group separation rib 6 is selected height to fluoridize material such as perfluoroethylene polypropylene to make.Certainly, line group separation rib 6 can also adopt the other materials with similar above-mentioned material to make, for example polypropylene, high density polyethylene (HDPE), poly-Fluoroalkyloxy resin, ethene one chlorotrifluoroethylene, polyvinyl chloride and polypropylene flame redardant etc.
Evenly be provided with protruding nail or pit on the fin both side surface of line group separation rib 6 shown in Figure 3, same uniformly dispersing has bubble on its cross section.The size of protruding nail or pit and spacing all should be less than the external diameters of insulation heart yearn 3, to reduce line group separation rib 6 and contact area to line group 2, increase line group separation rib 6 and to the air gap between the line group 2.So not only stop effectively to line group 2 positions move and scurry the position, improve positional stability to line group 2; And make the maximization of line group ambient air gap, further optimized the electric property of cable.
In line group separation rib 6 shown in Figure 4, this line group separation rib 6 is the bar shaped wave structure, and its bar shaped corrugated projection direction is perpendicular to the length direction of line group separation rib 6, and this structure makes the air gap between line group 2 and the line group separation rib 6 bigger.Certainly this bar shaped corrugated projection direction also can with the length direction of line group separation rib 6 in the same way or be certain intersecting angle.
In high-speed data cable shown in Figure 5, this data cable comprises that equally oversheath 1 and four pairs are to line group 2, each also forms by the insulation heart yearn 3 of two different colours is stranded equably line group 2, and it also is to be coated with insulating barrier 4 at conductor 5 that each of line group 2 is thoroughly done away with edge heart yearn 3.Be provided with a line group separation rib 6 that is foaming structure in the oversheath 1, be equipped with two pairs respectively to line group 2 in the both sides up and down of this line group separation rib 6, two couple who is positioned at separation rib 6 homonymies is opposite to the direction of lay of line group.
Be that with the previous embodiment difference insulating barrier 4 of insulation heart yearn 3 is a double-layer structure, the internal layer of insulating barrier 4 is plastic foamed layer, and skin is the plastics solid layer.Because the solid insulating barrier of permittivity ratio of plastic foamed layer is low, so that the total dielectric constant of insulating core line 3 insulating barriers descends, cable mutual capacitance descends significantly, has improved the antidamping ability in transmission loop, is more conducive to data cable and realizes high-frequency transmission information.
The body lug structure of this line group separation rib 6 still is the flat belt-like rib structure, but is provided with the camber end face 7 of T-shape in flank cross section both side ends, makes the cross sectional shape of line group separation rib 6 be " I " type structure.This reasonable in design exquisiteness, the existence of end transition arc type end side 7 makes that the cable external form of making is stablized, rounding, support, the fixation of separation rib are more effective, and stable cable profile has been consolidated the constancy to line group position; It is more steady, stressed even that the separation rib side is contacted with the oversheath inwall, strengthened the ability of cable resistance to deformation, and fabulous guarantee effect is played in the raising of electric property.
In high-speed data cable shown in Figure 6, this data cable also comprises oversheath 1 and four pairs to line group 2, and the insulation heart yearn 3 that constitutes line group 2 also is to be coated with insulating barrier 4 at conductor 5.Be provided with the line group separation rib 6 of a show bubble in the oversheath 1 equally, the both sides up and down of this line group separation rib 6 also respectively are provided with two pairs symmetrically to line group 2.
The insulating barrier 4 of insulation heart yearn 3 adopts three-decker, and the internal layer of insulating barrier is solid polyethylene layer, and the centre is the polyethylene foamed insulating barrier, and skin is solid polyethylene layer.Internal layer is the solid endothelium of a bed thickness 10 μ m, the air-tightness that its role is to increase the adhesion strength of insulating barrier and conductor 5 and improve insulating barrier, middle foaming layer has lower dielectric constant, skin is solid epidermis, thickness is about 50 μ m, and its effect is to increase isolation layer intensity and improve surface smoothness.This insulation layer structure had both had the favorable mechanical physical property, had fabulous electric property again, and had reduced the outside diameter of cable and weight.
This foam-like line group separation rib 6 is connected as a single entity with oversheath 1 and has constituted a foam fin that links to each other with oversheath, and this fin is divided into two zones that hold the line group symmetrically with oversheath 1.Because line group separation rib 6 fuses with oversheath 1, have more stable cross sectional shape and anti-torsion ability, more help fixing the line group, and will fully separate the line group, this structure has less the number of components, is convenient to the fabrication and processing and the quality assurance of cable, thereby simplifies cabling process effectively, improve production efficiency, stablized product quality.
Below only be specific embodiments more of the present invention, be to be understood that those of ordinary skills under the prerequisite of the principle of the invention, can also make a lot of conversion and improvement.As in the oversheath 1 line group 2 being not limited to four pairs, can also be other any logarithm; The bubble density and the size of line group separation rib 6 also can be decided as the case may be, and its technology is physical blowing both, also chemical blowing; The convex-concave surface of line group separation rib 6 also is not limited to protruding nail, pit and bar shaped ripple, can also be other corresponding construction form.The cable external form also is not limited to circular cross-section; Oversheath also can adopt two layers or more multi-layered cable core screen; Oversheath is designed to oversheath of functions such as having protection against the tide, fire-retardant or the like, and these improve and conversion all should be considered as falling within the scope of protection of the present invention.
Claims (10)
1, a kind of high-speed data cable, comprise oversheath (1) and some to line group (2), each is described thoroughly does away with edge heart yearns (3) stranded forming mutually to line group (2) by two, it is characterized in that: in described oversheath (1), be provided with a line group separation rib (6), this line group separation rib (6) cross section show bubble structure, the described both sides that line group (2) are positioned over symmetrically line group separation rib (6).
2, high-speed data cable according to claim 1 is characterized in that: described pumiceous texture is to be scattered with some bubbles equably on online group of separation rib (6) cross section.
3, high-speed data cable according to claim 1 is characterized in that: the surface of described line group separation rib (6) is concave-convex.
4, high-speed data cable according to claim 3 is characterized in that: described concave-convex surface is to be laid with protruding nail or pit on the surface of online group of separation rib (6).
5, high-speed data cable according to claim 3 is characterized in that: described concave-convex surface is that line group separation rib (6) is the bar shaped corrugated surface.
6, high-speed data cable according to claim 1 is characterized in that: described line group separation rib (6) is the flat belt-like structure, and its width extends to the inwall of oversheath (1).
7, high-speed data cable according to claim 6 is characterized in that: the cross section both side ends of described line group separation rib (6) is equipped with the camber end face (7) of the T-shape that is connected as a single entity with flank.
8, high-speed data cable according to claim 1 is characterized in that: described line group separation rib (6) is connected as a single entity with oversheath (1) and constitutes the sheath rib structure.
9, according to each described high-speed data cable among the claim 1-8, it is characterized in that: described line group (2) is had four pairs, each is placed with two pairs symmetrically to line group (2) both sides up and down of line group separation rib (6).
10, high-speed data cable according to claim 9 is characterized in that: the direction of lay to line group (2) that is positioned at line group separation rib (6) homonymy is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410065818 CN1624813A (en) | 2004-12-21 | 2004-12-21 | High-speed data cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410065818 CN1624813A (en) | 2004-12-21 | 2004-12-21 | High-speed data cable |
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| CN1624813A true CN1624813A (en) | 2005-06-08 |
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Family Applications (1)
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| CN 200410065818 Pending CN1624813A (en) | 2004-12-21 | 2004-12-21 | High-speed data cable |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7705244B2 (en) | 2007-11-14 | 2010-04-27 | Clipsal Australia Pty Limited | Multi-conductor cable construction |
| CN101714423A (en) * | 2009-12-04 | 2010-05-26 | 烟台新牟电缆有限公司 | Novel CAT6 data transmission cable filled with isolation bar in jacket |
| CN102074283A (en) * | 2010-11-16 | 2011-05-25 | 江苏河阳线缆有限公司 | Symmetrical cable capable of keeping capacitance constant and manufacturing method thereof |
| CN102280196A (en) * | 2011-08-20 | 2011-12-14 | 宁波意欧迅网络通信有限公司 | Rj45 cable |
| CN103208335A (en) * | 2013-05-08 | 2013-07-17 | 中利科技集团股份有限公司 | High speed data cable |
| CN105702375A (en) * | 2014-12-12 | 2016-06-22 | 住友电气工业株式会社 | Shielding cable |
| CN113488268A (en) * | 2021-07-07 | 2021-10-08 | 安徽徽宁电器仪表集团有限公司 | Weather resistance frequency conversion power cable |
-
2004
- 2004-12-21 CN CN 200410065818 patent/CN1624813A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7705244B2 (en) | 2007-11-14 | 2010-04-27 | Clipsal Australia Pty Limited | Multi-conductor cable construction |
| CN101714423A (en) * | 2009-12-04 | 2010-05-26 | 烟台新牟电缆有限公司 | Novel CAT6 data transmission cable filled with isolation bar in jacket |
| CN102074283A (en) * | 2010-11-16 | 2011-05-25 | 江苏河阳线缆有限公司 | Symmetrical cable capable of keeping capacitance constant and manufacturing method thereof |
| CN102074283B (en) * | 2010-11-16 | 2013-03-13 | 江苏河阳线缆有限公司 | Symmetrical cable capable of keeping capacitance constant and manufacturing method thereof |
| CN102280196A (en) * | 2011-08-20 | 2011-12-14 | 宁波意欧迅网络通信有限公司 | Rj45 cable |
| CN103208335A (en) * | 2013-05-08 | 2013-07-17 | 中利科技集团股份有限公司 | High speed data cable |
| CN104751999A (en) * | 2013-05-08 | 2015-07-01 | 王笑梅 | High-speed data cable |
| CN104751999B (en) * | 2013-05-08 | 2016-07-13 | 国网山东省电力公司莱芜供电公司 | A kind of high-speed data cable |
| CN105702375A (en) * | 2014-12-12 | 2016-06-22 | 住友电气工业株式会社 | Shielding cable |
| CN105702375B (en) * | 2014-12-12 | 2018-04-17 | 住友电气工业株式会社 | Shielded cable |
| CN113488268A (en) * | 2021-07-07 | 2021-10-08 | 安徽徽宁电器仪表集团有限公司 | Weather resistance frequency conversion power cable |
| CN113488268B (en) * | 2021-07-07 | 2022-11-11 | 安徽徽宁电器仪表集团有限公司 | Weather resistance frequency conversion power cable |
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