CN102231303B

CN102231303B - Shielding digital communication cable

Info

Publication number: CN102231303B
Application number: CN2011100974452A
Authority: CN
Inventors: 沈小平; 周洪鹏; 徐伟
Original assignee: Jiangsu Tongding Optic Electronic Stock Co Ltd
Current assignee: Tongding Interconnection Information Co Ltd; Jiangsu Tongding Optic Electronic Stock Co Ltd
Priority date: 2011-04-19
Filing date: 2011-04-19
Publication date: 2012-11-07
Anticipated expiration: 2031-04-19
Also published as: CN102231303A

Abstract

The invention relates to a shielding digital communication cable which comprises: a plurality of line pairs, a woven shield coating out of the line pairs, a sheath extruding out of the woven shield. Each line pair comprises two single lines which are intertwisted. Each single line is formed by a copper conductor and an insulating layer coating out of the copper conductor. Each line pair is longitudinally wrapped with a layer of one-side aluminum foil. Two ends of the aluminum foil are overlapped. A row streamline is arranged between a plurality of line pairs. The row streamline is tightly contacted with aluminum foil metal surfaces of the each line pair. In the invention, the shield can be further formed through longitudinally wrapping the line pairs with the aluminum foils and the row streamline is arranged between the line pairs so as to reach requirements of protective grounding and shield grounding. A problem of crosstalk in the line pairs can be effectively solved and effective signal transmission can be guaranteed.

Description

A kind of shielding cable for digital communication

Technical field

the present invention relates to a kind of telecommunication cable, relate in particular to a kind of novel shielding cable for digital communication.

Background technology

are along with the fast development of global IT application highway; The local area network (LAN) digital cable has obtained further large-scale application; Rapidly being doubled and redoubled and the access network technology leapfrogging growth of network technology proposed requirements at the higher level for the transmission of Information media.

gigabit Ethernet can not satisfy the consumer wideband requirement, and 10,000,000,000 will become mainstream technology than Ethernet (10Gbps).Corresponding cable for digital communication needs from surpassing five types (100Mbps), six types (200Mbps) to seven types (600Mbps), eight types of (1000Mbps) production developments; Key technology is how to solve cross-talk and attenuation problem, and the application just is being based on the improvement of carrying out under the above-mentioned background situation.

Summary of the invention

the present invention seeks to provide for the deficiency that overcomes prior art the telecommunication cable of a kind of effective reduction cross-talk and decay.

are for achieving the above object; The technical scheme that the present invention adopts is: a kind of shielding cable for digital communication; Comprise a plurality of lines to, be coated on described a plurality of line to the woven shield of periphery, extrusion molding sheath in said woven shield periphery, each described line is to comprising the single line of two mutually stranded settings, every single line is made up of copper conductor and the insulating barrier that is coated on the copper conductor periphery; The externally vertical bag one deck of each described line single face aluminium foil; The both ends overlaid of described aluminium foil is provided with, a plurality of described lines between also be provided with drain wire, described drain wire closely contacts last aluminum foil metal face with each line mutually.

further, the arc length of described aluminium foil two ends overlaid part accounts for whole line to 20%～50% of circumference.

described aluminum foil thickness is 0.05-0.10mm.

described line is to being four, and described drain wire is positioned at four centers that line is right, and each described line is mutually 90 degree to the aluminium foil opening part along the circle tangential direction, thereby reaches best shield effectiveness.

described drain wire is copper cash or tinned wird, and its diameter is 0.4～0.6mm.

described woven shield is that copper wire or tinned copper wire braiding form.

The insulating barrier of described single line is the skin foam skin structure, and it is made up of endothelium, foaming layer and crust, and described endothelium is processed by low-density polyethylene material, and its thickness is 0.02-0.03mm; Described foaming layer is a physical blowing, and foam degrees is 50%-60%; Described crust is processed by high-density polyethylene material, and its thickness is greater than 0.1mm, and insulating barrier can reduce the external diameter that insulate through adopting the skin foam skin structure, further improves product decay index.

are because the utilization of technique scheme; The present invention compared with prior art has advantage: cable of the present invention further forms shielding through online externally vertical alclad paper tinsel; And online between lay drain wire; Reach protective ground and bonding requirement, can effectively solve the problem of line, guarantee that signal effectively transmits a cross-talk.

Description of drawings

Accompanying drawing 1 is a kind of telecommunication cable of the technical scheme institute practical implementation according to the present invention;

Wherein: 1, line is right; 11, single line; 112, copper conductor; 111, insulating barrier; 1111, endothelium; 1112, physical blowing layer; 1113, crust; 21, drain wire; 22, aluminium foil; 23, woven shield; 3, sheath;

Embodiment

Below in conjunction with accompanying drawing, specify particular content of the present invention for example:

like the described cable of Fig. 1, and it is made up of cable core, the screen 23 and the sheath 3 that are coated on the cable core.Wherein, Cable core mainly is made up of 1 four mutually stranded lines; Each line is to 1 by two single lines 11 even stranded forming mutually, and every single line 11 is made up of solid copper wire 112 and the insulating barrier 111 that is coated on solid copper wire 112 peripheries, in the present embodiment; Insulating barrier 111 structures are the skin foam skin structure, and promptly it is made up of endothelium 1111, foaming layer 1112 and crust 1113.Wherein, described endothelium 1111 is processed by low-density polyethylene material (LDPE), and its thickness is 0.02-0.03mm; Described foaming layer 1112 is a physical blowing, and foam degrees is 50%-60%; Described crust 1113 is processed by high-density polyethylene material (HDPE), and its thickness is greater than 0.1mm.Adopt the skin foam skin structure through insulating barrier, reduce the external diameter that insulate, improve product decay index.

The single face aluminium foil 21 that each described line is 0.05-0.10mm to 1 outer overlapping vertical bag one layer thickness; The line of four shieldings is arranged in order 1 in the direction of the clock; Each line is provided with the aluminium foil 21 two ends overlaids on 1; And overlapping arc length accounts for whole line to 25% of circumference, and four lines are mutually 90 degree to aluminium foil 21 shielding opening part A along the circle tangential direction, to reach best shield effectiveness.

In present embodiment, to 1 the center drain wire 21 that a diameter also is set is 0.4～0.6mm, described drain wire 21 contacts with four right aluminium foil 21 metal coverings of line, to guarantee protective ground and bonding requirement at four lines.

described drain wire 21 and woven shield 23 are processed by copper wire or tinned copper wire, and described sheath 3 thickness are 0.6mm-1.0mm, and it is formed by PVC material extrusion molding.

present embodiment through online externally vertical alclad paper tinsel shielding, a drain wire is put at the center and cable core adds copper wire braid shielded mode; And, can effectively solve line to a cross-talk difficult problem through externally vertical alclad paper tinsel mask overlap rate of line and opening direction design.

are above to illustrate and explains specific embodiment of the present invention; But the present invention is not only limited to above embodiment; Be decided to be four to differing like line, all equivalent transformations of being done according to the present invention all should be within protection scope of the present invention.

Claims

1. one kind shields cable for digital communication; Comprise a plurality of lines to (1), be coated on described a plurality of line to the woven shield (23) of (1) periphery, extrusion molding sheath (3) in said woven shield (23) periphery; Each described line comprises the single line (11) of two mutually stranded settings to (1); Every single line (11) is made up of copper conductor (112) and the insulating barrier (111) that is coated on copper conductor (112) periphery; It is characterized in that: each described line is to (1) outer vertical bag one deck single face aluminium foil (22); Described aluminium foil (22) thickness is 0.05-0.10mm, and the both ends overlaid of described aluminium foil (22) is provided with, and described line is four to (1); Between a plurality of described lines are to (1), also be provided with drain wire (21); Described drain wire (21) is positioned at the center of four lines to (1), and each described line is mutually 90 degree to aluminium foil (22) opening part along the circle tangential direction, and described drain wire (21) and each line closely contact the aluminium foil on (1) (22) metal covering mutually.

2. shielding cable for digital communication according to claim 1 is characterized in that: the arc length of described aluminium foil (22) two ends overlaid part accounts for whole line to 20%～50% of (1) circumference.

3. shielding cable for digital communication according to claim 1 is characterized in that: described drain wire (21) is copper cash or tinned wird, and its diameter is 0.4～0.6mm.

4. shielding cable for digital communication according to claim 1 is characterized in that: described woven shield (23) is that copper wire or tinned copper wire braiding form.

5. shielding cable for digital communication according to claim 1; It is characterized in that: the insulating barrier (111) of described single line (11) is the skin foam skin structure; It is made up of endothelium (1111), foaming layer (1112) and crust (1113); Described endothelium (1111) is processed by low-density polyethylene material, and its thickness is 0.02-0.03mm; Described foaming layer (1112) is a physical blowing, and foam degrees is 50%-60%; Described crust (1113) is processed by high-density polyethylene material, and its thickness is greater than 0.1mm.