CN202473398U

CN202473398U - Fire-resistant signal cable for metro

Info

Publication number: CN202473398U
Application number: CN2012201159454U
Authority: CN
Inventors: 马金龙; 汤永怀
Original assignee: ANHUI TIANLONG ELECTRIC CABLE GROUP Co Ltd
Current assignee: Anhui long union intelligent photoelectric Co., Ltd.
Priority date: 2012-03-23
Filing date: 2012-03-23
Publication date: 2012-10-03
Anticipated expiration: 2022-03-23

Abstract

The utility model discloses a fire-resistant signal cable for a metro, which is characterized in that an insulated wire core is formed by extruding an insulating layer on a conductor; a stranded body is formed by two, three or four insulated wire cores; a polyester belting layer, a unit shielding layer and a shielding and insulating layer are sequentially arranged on the outer layer of the stranded body from inside to outside, thus forming a unit group,; a unit drainage wire is arranged between the polyester belting layer and the unit shielding layer; a cable core is formed by a plurality of the unit groups; an inner belting layer, a total shielding layer, a thermal-protective layer, an aluminium protection layer, an inside liner, an armor layer and an outer sheath layer are sequentially arranged on the outer layer of the cable core from inside to outside; a total shielding drainage wire is arranged between the inner belting layer and the total shielding layer; the insulating layer is made of physical foaming polytetrafluoroethylene; and the outer sheath layer is made of TPU (Thermoplastic Polyurethanes) elastic materials or low smoke halogen free flame retardant materials. The fire-resistant signal cable for the metro has the functions of signal transmission, data transmission, fire resistance, electromagnetic interference resistance, flame retardance, environmental protection, low attenuation, mechanical shock resistance, and long service life.

Description

Subway is used fire resistance signal cable

Technical field

The utility model relates to a kind of signal and data cable, relates in particular to a kind of subway and uses fire resistance signal cable, belongs to technical field of electric wires and cables.

Background technology

In recent years; China's economic development is rapid, and process of modernization is obviously accelerated, and city size, urban population constantly enlarge; The congested traffic condition that thereupon produces had both hindered the development of urban economy, had also influenced the normal order of social activities and resident's go off daily.Urban track traffic has at present become in the world, and some developed countries solve the difficult effective measures of urban transportation with the area.

Flame retardant coating adopts mica tape and extrudes refuge floor in the conventional wires, but fire insulation can not stop the transmission of heat, so fire resistance has much room for improvement.

Summary of the invention

The utility model is for avoiding above-mentioned existing in prior technology weak point; A kind of function with signal transmission and transfer of data is provided, and have fire-resistant, anti-electromagnetic interference, fire-retardant, environmental protection, lowly decay, the subway of advantages such as anti-mechanical shock and long-life uses fire resistance signal cable.

The utility model technical solution problem adopts following technical scheme:

The utility model subway is that the extruded insulation layer constitutes insulated wire cores on conductor with the design feature of fire resistance signal cable; Constitute intertwist body by two, three or four said insulated wire cores; Skin at said intertwist body sets gradually polyester belting layer, unit screen and shield dielectric layer formation unit group from inside to outside, between said polyester belting layer and unit screen, the unit drainage thread is set; Constitute cable core by a plurality of said unit group, set gradually interior belting layer, total screen, thermal insulation layer, alibate, inner covering, armour and external sheath layer from inside to outside at the skin of said cable core; In said, between belting layer and the total screen total shielding drainage thread is set;

Said insulating barrier is to be material with physical blowing type polytetrafluoroethylene;

Said external sheath layer is to be material with polyurethane TPU elastomeric material or halogen-free low-smoke flame retardant material.

The utility model subway also is with the design feature of fire resistance signal cable:

Said thermal insulation layer is to be material with the expansion type expansion plastic.

Said inner covering is the pottery material of silicon rubber base material.

Respectively organize the unit group in the said cable core and adopt different star quad stranding pitches.

Compared with present technology, the utility model beneficial effect is embodied in:

1, insulating barrier has adopted excellent electrical properties, the higher physical blowing polytetrafluoroethylmaterial material of mechanical performance in the utility model, and temperature resistant grade is high, has improved fire resistance;

2, the unit group adopts different star quad stranding pitches in the utility model, reduced line between electromagnetic coupled, improved the cable anti-interference;

3, cable core adopts the alibate structure outward in the utility model, on the one hand plays shielding action, can reduce flame and high temperature on the other hand and stretch in the cable core raising fireproof purpose;

4, thermal insulation layer adopts expansion type intumescent plastics and inner covering to adopt the ceramic formed material of silicon rubber base material in the utility model, plays fire prevention, heat insulation purpose, raising fireproofing of cable performance;

5, the utility model cable jacket layer employing polyurethane TPU elastomeric material or halogen-free low-smoke flame retardant material are material, and it has advantages such as environmental protection, safety.

Description of drawings

Fig. 1 is seven groups of Samsungs structure sketch mapes that tangle for the utility model;

Label among the figure: 1 conductor, 2 insulating barriers, 3 polyester belting layers, 4 unit drainage threads, 5 unit screens; 6 shield dielectric layer, 7 cable cores, 8 interior belting layers, 9 total shielding drainage threads, 10 total screens; 11 thermal insulation layers, 12 alibates, 13 inner coverings, 14 armours, 15 external sheath layers.

Embodiment

Referring to Fig. 1; Be that seven group of three star quad stranding subway used fire resistance signal cable in the present embodiment; Extruded insulation layer 2 constitutes insulated wire cores on the conductor 1; Constitute the unit group by three insulated cores, constitute cable core 7 by seven unit groups, cable core 7 skins set gradually interior belting layer 8, total screen 10, thermal insulation layer 11, alibate 12, inner covering 13, armour 14 and external sheath layer 15 from inside to outside; The insulating barrier 2 that on conductor 1, extrudes is to be material with physical blowing type polytetrafluoroethylene; The unit group sets gradually polyester belting layer 3, unit screen 5 and shield dielectric layer 6 from inside to outside at the skin of the intertwist body that is made up of three insulated cores strand, between polyester belting layer 3 and unit screen 5, unit drainage thread 4 is set; At the interior belting layer 8 of cable core 7 and in always between the screen 10 total shielding drainage thread 9 is set; External sheath layer 15 is to be material with polyurethane TPU elastomeric material or halogen-free low-smoke flame retardant material.

In the practical implementation, respectively organize the unit group in the cable core 7 and adopt different star quad stranding pitches, thermal insulation layer 11 is an expansion type intumescent plastic material, and inner covering 13 is the pottery material of silicon rubber base material.

Claims

1. subway is used fire resistance signal cable; It is characterized in that going up extruded insulation layer (2) at conductor (1) constitutes insulated wire cores; Constitute intertwist body by two, three or four said insulated wire cores; Skin at said intertwist body sets gradually polyester belting layer (3), unit screen (5) and shield dielectric layer (6) formation unit group from inside to outside, between said polyester belting layer (3) and unit screen (5), unit drainage thread (4) is set; Constitute cable core (7) by a plurality of said unit group, set gradually interior belting layer (8), total screen (10), thermal insulation layer (11), alibate (12), inner covering (13), armour (14) and external sheath layer (15) from inside to outside at the skin of said cable core (7); Between belting layer in said (8) and the total screen (10) total shielding drainage thread (9) is set;

Said insulating barrier (2) is to be material with physical blowing type polytetrafluoroethylene;

Said external sheath layer (15) is to be material with polyurethane TPU elastomeric material or halogen-free low-smoke flame retardant material.

2. subway according to claim 1 is used fire resistance signal cable, it is characterized in that said thermal insulation layer (11) is is material with the expansion type expansion plastic.

3. subway according to claim 1 is used fire resistance signal cable, it is characterized in that said inner covering (13) is the pottery material of silicon rubber base material.

4. subway according to claim 1 is used fire resistance signal cable, it is characterized in that respectively organizing in the said cable core (7) the unit group and adopts different star quad stranding pitches.