CN201153063Y - Low attenuation digital signal cable - Google Patents

Abstract

The utility model relates to a low attenuation digital signal cable, belonging to the technical field of cables. The cable comprises a compound cable core and an insulated tape lapping layer, a polythene inner lining layer, an aluminum tape welding layer, a hot-melt adhesive anticorrosion layer, a polythene inner sheath, a steel tape armoring layer, an outer sheath, etc., which are arranged outside the cable core, wherein, the compound cable core comprises an insulation single wire, a twine, a quad, a shielding twine and a shielding quad. The low attenuation digital signal cable has the advantages of novel, scientific and reasonable design, easy production and manufacture, stable and reliable transmission performance and excellent cross talk and inference resistance performance. Both uniform signals and different signals can be transmitted in the same cable, and the traffic signal quality and the voice communication quality are ensured, the performance of electricity is stable; the cable can satisfy the connection requirement of control devices of related equipment of railway signaling system in railway traffic, thereby improving the traffic management capacity and efficiency, reducing the traffic accidents and promoting the development of traffic enterprises.

Description

Low decay digital signal cable

Technical field

The utility model relates to a kind of structure and manufacturing process of digital signal cable, belongs to the cables manufacturing field.

Background technology

Along with the high speed development of track traffic, the increase of traffic closeness, the quality of traffic has become the sign of social life quality.While is along with the development of new technology, the speed of track traffic is more and more faster, traffic administration is more and more concentrated, the variation of data transfer mode requires cable can adapt to the ability of trend, can transmit various data, keep traffic signals quality and speech communication quality, this will be to the severity that improves traffic accident, and minimizing personnel and property loss all are very important.The common cable of formations such as existing conductor, insulating barrier and oversheath can not satisfy the connection cable between the relevant devices and control device in the track traffic middle orbit signal system.

The utility model content

The purpose of this utility model is exactly for adapting to the needs of track traffic development, provide a kind of satisfy in the track traffic in the signal system connect the requirement that waits the usefulness cable between the relevant devices and control device, can keep the low decay digital signal cable of traffic signals quality and voice communication quality.

The purpose of this utility model is to realize like this, low decay digital signal cable, comprise insulated electric conductor and oversheath that insulating barrier is set on the conductor, it is characterized in that being provided with single line, to the line group, quad, shielding is to the line group, the insulating tape lapping layer that is provided with on mixing cable core that the shielding quad constitutes and the cable core, the polyethylene liner layer, the aluminium strip weld layer, the PUR anticorrosive coat, the polyethylene inner sheath, the steel-tape armouring layer, insulating tape is wrapped on cable core, on the insulating tape lapping layer, extrude the polyethylene liner layer, parcel aluminium strip weld layer on the polyethylene liner layer, the PUR anticorrosive coat extrudes on the aluminium strip weld layer, on the PUR anticorrosive coat, extrude the polyethylene inner sheath, on the polyethylene inner sheath, adopt the wrapped steel-tape armouring layer of double-deck superconduction magnet steel band gap, extrude the polyethylene oversheath at steel-tape armouring layer outer surface.

Described single line is for to adopt the three-layer co-extruded physical foam insulation technology of skin-bubble-Pi to extrude the insulated electric conductor of polyethylene foamed insulating barrier on the anaerobic round copper wire.Described is the twisted wire group of two single lines to the line group.Described quad is the twisted wire group of four single lines, and pricks yarn on the twisted wire group.Described shielding is on to the line group behind the first lapped insulation band lapping layer to the line group, and wrapped again single face copper strips lapped shielding layer constitutes.Described shielding quad is that copper strips embossing or reticulate pattern vertical bag screen and two-layer insulating tape lapping layer are set on the twisted wire group of four single lines, and the vertical bag of copper strips embossing or reticulate pattern screen is arranged in the middle of the two-layer insulating tape lapping layer.Be provided with the earial drainage copper conductor in the covering of described shielding to line group, shielding quad.

The utility model novel structure is scientific and reasonable, manufactures easily, and transmission performance is reliable and stable, has excellent cross-talk and interference free performance.Conductor adopts the anaerobic round copper wire, and the transmission performance of cable is stable; Insulation system adopts the three-layer co-extruded insulation of physical blowing, makes cable have good electric property, reduces the transmission attenuation of cable under the situation of same structure size; Cable core adopts single line, to line group, quad, shielding to stranded strandings of unit concentric type such as line group, shielding quads, this multiple unit stranding mode, signal identical or inequality is transmitted in same cable, and can keep traffic signals quality and voice communication quality, electric property is stable; The wrapped shielding of copper strips adds the anti-electromagnetic interference capability of copper strips embossing or the reticulate pattern vertical bag shielding raising the anti-cable of cable; The employing metallic sheath further improves the external anti-electromagnetic interference capability of cable, improves the life-span and the mechanical strength of cable.Low decay internal screening railway digital signal cable has the ability that adapts to the various data of transmission, satisfy to connect between the relevant devices of signal system in the track traffic and the control device and use the cable requirement, this improves traffic administration ability and efficient with favourable sky, reduce the generation of traffic accident, promote the development of communication.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Among the figure: conductor 1, insulating barrier 2, bundle yarn 3, insulating tape lapping layer 4, polyethylene liner layer 5, aluminium strip weld layer 6, PUR anticorrosive coat 7, polyethylene inner sheath 8, steel-tape armouring layer 9, polyethylene oversheath 10, single face copper strips lapped shielding layer 11, copper strips embossing or the vertical bag of reticulate pattern screen 12, earial drainage copper conductor 13.

Embodiment

Conductor 1 adopts the anaerobic round copper wire, and insulating barrier 2 adopts the polyethylene foamed material.On the anaerobic round copper wire, adopt the three-layer co-extruded physical foam insulation technology of skin-bubble-Pi to extrude the polyethylene foamed insulating barrier and constitute insulated single wire.Carry out stranded formation to the line group with two single lines.Carry out strandedly with four single lines, and on the twisted wire group, prick yarn 3 and constitute the line group.On to the line group earial drainage copper conductor 13 and lapped insulation band lapping layer 4 are set, wrapped again 0.065mm single face copper strips lapped shielding layer 11 constitutes shielding to the line group, and earial drainage copper conductor 13 adopts the soft round conductor of 0.4-0.5mm to contact with the copper layer.The centre that the vertical bag of earial drainage copper conductor 13 and 0.1mm soft copper band embossing or reticulate pattern screen 12 is arranged on two-layer insulating tape lapping layer 4 is set on the twisted wire group of four single lines, and earial drainage lead 13 adopts 0.5 soft round conductor to contact with copper strips.Get two on single line, two of line groups, five of quads, shielding be twisted into cable core for two groups to two groups of line groups, shielding quad, at cable core lapped insulation band lapping layer 4.Extrude polyethylene liner layer 5 at insulating tape lapping layer 4, on polyethylene liner layer 5, wrap up aluminium strip weld layer 6 successively, extrude PUR anticorrosive coat 7 and polyethylene inner sheath 8, adopt the wrapped steel-tape armouring layer 9 in double-deck gap on polyethylene inner sheath 8, polyethylene oversheath 10 is extruded in steel-tape armouring layer outer surface.

Claims (7)

1, a kind of low decay digital signal cable, comprise insulated electric conductor and oversheath that insulating barrier is set on the conductor, it is characterized in that being provided with single line, to the line group, quad, shielding is to the line group, the insulating tape lapping layer that is provided with on mixing cable core that the shielding quad constitutes and the cable core, the polyethylene liner layer, the aluminium strip weld layer, the PUR anticorrosive coat, the polyethylene inner sheath, the steel-tape armouring layer, insulating tape is wrapped on cable core, on the insulating tape lapping layer, extrude the polyethylene liner layer, parcel aluminium strip weld layer on the polyethylene liner layer, the PUR anticorrosive coat extrudes on the aluminium strip weld layer, on the PUR anticorrosive coat, extrude the polyethylene inner sheath, on the polyethylene inner sheath, adopt the wrapped steel-tape armouring layer of double-deck superconduction magnetic gap, extrude the polyethylene oversheath at steel-tape armouring layer outer surface.

2, low decay digital signal cable according to claim 1 is characterized in that described single line is for to adopt the three-layer co-extruded physical foam insulation technology of skin-bubble-Pi to extrude the insulated electric conductor of polyethylene foamed insulating barrier on the anaerobic round copper wire.

3, low decay digital signal cable according to claim 1 is characterized in that described is the twisted wire group of two single lines to the line group.

4, low decay digital signal cable according to claim 1 is characterized in that described quad is the twisted wire group of four single lines, and prick yarn on the twisted wire group.

5, low decay digital signal cable according to claim 1 is characterized in that described shielding is on to the line group behind the first lapped insulation band lapping layer to the line group, and wrapped again single face copper strips lapped shielding layer constitutes.

6, low decay digital signal cable according to claim 1, it is characterized in that described shielding quad is that copper strips embossing or reticulate pattern vertical bag screen and two-layer insulating tape lapping layer are set on the twisted wire group of four single lines, the vertical bag of copper strips embossing or reticulate pattern screen is arranged in the middle of the two-layer insulating tape lapping layer.

7, low decay digital signal cable according to claim 1 is characterized in that being provided with the earial drainage copper conductor in the covering of described shielding to line group, shielding quad.

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