CN201607995U

CN201607995U - Novel internal shielding railway digital signal cable

Info

Publication number: CN201607995U
Application number: CN2010200225799U
Authority: CN
Inventors: 蓝燕锐; 徐友胜
Original assignee: ZHONGTIAN RILI RF CABLE CO Ltd
Current assignee: Zhongtian RF cable Co., Ltd.
Priority date: 2010-01-15
Filing date: 2010-01-15
Publication date: 2010-10-13
Anticipated expiration: 2020-01-15

Abstract

The utility model relates to a novel internal shielding railway digital signal cable which comprises a cable core and an outer wrapping layer; the cable core comprises core wires of a plurality of wire groups; the outer wrapping layer sequentially comprises an outer shielding layer, an inner protective sleeve, a steel belt armoring layer and an outer protective sleeve; each wire group comprises a wire core, a pair twist group, a spiral quad and a shielded spiral quad; a copper shielding layer is arranged outside the shielded spiral quad; the wire core is an insulating single wire; in all the wire groups, the shielded spiral quad adopts the same pitch, and the shielded quad and the non-shielded wire group adopt the same pitch. The product of the patent not only simplifies the product structure, but also greatly improves the production efficiency, but the product quality is not reduced. Experience shows that all properties of the product which is processed through the method fully meet and are better than standard provisions.

Description

A kind of novel internal screening railway digital signal cable

Technical field

The utility model relates to a kind of cable, particularly relates to a kind of novel internal screening railway digital signal cable.

Background technology

Present internal screening railway digital signal cable cable core is made up of the heart yearn of some line groups, in cable core, has at least one inner shield quad, according to Theory of Electromagnetic Field, as can be known, online to producing the electromagnetic field of alternation on every side, other adjacent with it line group, under the effect of this electromagnetic field, with producing induced current, the mechanism that the cross-talk coupling that Here it is between the cable group produces, so go out in the process in message transmission, adopt the meeting of same pitch to produce serious the interference.For this reason in the production of cable, adjacent line is to adopting different pitches, clocklike intersects the couple current balance as much as possible of positive and negative electromagnetic induction by core, makes interfering with each other of adjacent lines centering reduce to our acceptable degree.

The utility model content

The utility model purpose provides a kind of novel internal screening railway digital signal cable, can significantly boost productivity by of the present utility model, the product of safety and reliability is provided for railway transportation, it is a kind of novel inner shield digital signal cable, form by cable core and outer wrapping layer, described cable core is made up of the heart yearn of some line groups, described outer wrapping layer is followed successively by outer shielding layer, inner sheath, steel-tape armouring layer and oversheath, its line group is by core, the pair twist group, the star quad of star quad and band shielding constitutes, the star quad of described band shielding, the outside is a copper shield, and described core is an insulated single wire.

As a kind of improvement of the present utility model, the star quad of described shielding can adopt same pitch, adopts same pitch can significantly simplify the course of processing.

As a kind of improvement of the present utility model, described shielding quad with can adopt same pitch with non-shielding quad, its main purpose is still for simplifying the course of processing.

Not only simplify product structure by the described product of this patent, and increase substantially production efficiency, but the quality of product does not reduce.Empirical tests uses every performance of this method processing back product to satisfy and be better than the regulation of standard fully.

Description of drawings

Fig. 1 is the schematic diagram of insulated single wire of the present utility model

Fig. 2 is the schematic diagram of pair twist group of the present utility model

Fig. 3 is the schematic diagram of star quad of the present utility model

Fig. 4 is the schematic diagram of shielding star quad of the present utility model

Fig. 5 is the schematic diagram of internal screening railway digital signal cable of the present utility model

1, line group; 1-1, insulated single wire; 1-2, pair twist group; 1-3, star quad;

The star quad of 1-4, band shielding; 1-4-1, copper shield; 2, integument;

2-1, outer shielding layer; 2-2, inner sheath; 2-3, steel-tape armouring layer; The 2-4 oversheath

Embodiment

Below in conjunction with drawings and Examples the utility model is described in detail.

The utility model provides a kind of internal screening railway digital signal cable as shown in Figure 5 to be made up of cable core and outer wrapping layer 2, described cable core is made up of the heart yearn of some line groups 1, described outer wrapping layer 2 is followed successively by outer shielding layer 2-1, inner sheath 2-2, steel-tape armouring layer 2-3 and oversheath 2-4, its line group 1 is by core, pair twist group 1-2 such as Fig. 2, star quad 1-4 such as Fig. 4 of star quad 1-3 such as Fig. 3 and band shielding constitute, the star quad 1-4 of described band shielding, the outside is copper shield 1-4-1, described core is insulated single wire 1-1 such as Fig. 1, the star quad 1-4 of described shielding can adopt same pitch, and described shielding quad 1-4 and non-shielding conductor group adopt same pitch.

The utility model is for internal screening railway digital signal cable, and its cable core is made up of the heart yearn of some line groups 1, and its line group 1 is made of the star quad 1-4 of core, pair twist group 1-2, star quad 1-3 and band shielding.In cable core has during a plurality of shielding star quad stranding four line line 1-4.Shielding star quad 1-4 can adopt same twisting pitch, adopts the bundle yarn or the silk ribbon of same color.In last sequence star strand quad 1-3, two on the diagonal thoroughly does away with edge single line 1-1 and constitutes a work loop, so a star quad 1-3 comprises two pairs of working pairs.

Characteristics of the present utility model are, because internal screening railway digital signal cable, because star quad 1-3 has increased copper shield 1-4-1 outward, through test and analysis, we think, between other line group of adjacent shielding quad 1-4 or shielding quad 1-4 and non-shielding, the electromagnetic field that can not consider transmission current generation in the line group fully is to other line group Effect on Performance.Can simplify the structural design of product greatly like this and enhance productivity.

Its advantage at first, twisting pitch of its shielding quad 1-4 can be arbitrarily, all shielding quad 1-4 can adopt same pitch, also to adopt same pitch with non-shielding conductor group.

Secondly the shielding star quad 1-4 of diverse location in cable conductor can be with the bundle yarn of same color, like this with regard to the production of the star quad of simplification.

The star quad 1-4 that adds screen once more for needs just distinguishes it when producing screen.Adopt different colors or twine the yarn or the silk ribbon of different colors or extrude the plastic sheath of different colours as plastic tape that screen is used.Because good nonmetal band or the covers of insulation property such as the necessary winding plastic of bag screen are so use the nonmetal band of this band look or cover can not reduce the efficient that this this preface of road is produced.

Claims

1. novel internal screening railway digital signal cable, form by cable core and outer wrapping layer (2), described cable core is made up of the heart yearn of some line groups (1), it is characterized in that: described outer wrapping layer (2) is followed successively by outer shielding layer (2-1), inner sheath (2-2), steel-tape armouring layer (2-3) and oversheath (2-4), its line group (1) is made of the star quad (1-4) of core, pair twist group (1-2), star quad (1-3) and band shielding, star quad (1-4) outside of described band shielding is copper shield (1-4-1), and described core is insulated single wire (1-1).

2. a kind of novel internal screening railway digital signal cable according to claim 1 is characterized in that: the star quad (1-4) of shielding adopts same pitch in described each line group (1).

3. a kind of novel internal screening railway digital signal cable according to claim 2 is characterized in that: described shielding quad (1-4) adopts same pitch with non-shielding conductor group.