CN201247608Y

CN201247608Y - Special DC united-hop cable for subway

Info

Publication number: CN201247608Y
Application number: CNU200820068139XU
Authority: CN
Inventors: 郑玉顺; 曾学忠; 孙章栓; 郑建强; 赵占红; 宋小燕; 郭水龙; 郑作海
Original assignee: CHANGJIANG ELECTRIC CABLE Ltd
Current assignee: CHANGJIANG ELECTRIC CABLE Ltd
Priority date: 2008-06-25
Filing date: 2008-06-25
Publication date: 2009-05-27
Anticipated expiration: 2018-06-25

Abstract

The utility model provides a DC (Direct Current) combination jump special cable for a subway, which belongs to the technical field of cables. The DC combination jump special cable for the subway mainly comprises a plurality of pair conductors of twisted pair wires, and an insulating layer is coated outside the conductors; an inner lining layer is arranged outside the conductors coated by the insulating layer, and a copper strip shielding layer, a wrapping strip layer and an armor layer are sequentially arranged between the inner lining layer and an outer protective sleeve. The DC combination jump special cable for the subway has the advantages of stable transmission signals, strong anti-jamming performance and environment-friendly performance, has a plurality of functions of resisting termites, rats, water, ultraviolet rays, and the like at the same time and is extremely suitable for places with higher requirements for device safety, such as the subway.

Description

Subway special DC connection is jumped cable

Technical field

The utility model relates to a kind of cable, and particularly a kind of 1000V special DC connection of subway that is applicable to is jumped cable.

Background technology

Before, the cable and wire that uses on the market at home, its insulation, sheath material mainly are polyvinyl chloride and polythene material, easy breaking out of fire during electric wire short circuit that the traditional polyvinyl chloride of this employing, polyethylene process are produced, smoke density is big during burning, and can produce a large amount of harmful halogen gass, the physical and mental health and the property safety that directly endanger the user.The 1000V direct current connection that subway engineering uses is jumped cable as not adopting protection against rodents, termite-proof, waterproof, antiultraviolet cable, and very possible because cable fault causes damage, and brings potential safety hazard to the operation of subway.

Summary of the invention

The purpose of this utility model is to provide a kind of subway special DC connection with good protection against rodents, termite-proof, waterproof, ultraviolet resistance to jump cable, can reduce because the loss that cable fault caused, for the normal operation of subway provides reliable assurance.

The purpose of this utility model is achieved in that a kind of subway special DC connection jumping cable, comprise that many twisted pair wires are to conductor, conductor is coated with insulating barrier, be insulated the many of layer coating conductor is inner covering outward, be provided with copper strips screen, belting layer and armour between inner covering and the oversheath successively.

Subway special DC provided by the utility model connection is jumped cable, and the electrical property of cable satisfies request of national standard fully to be asked, steady signal transmission, and strong anti-interference performance is installed, maintenance cost is low; Light transmittance is not less than 70% during cable fire; PH value 〉=4.3 during the sheath burning; Conductivity≤10 μ S/mm.Cable has the category-A or the category-B flame retardant level of GB/T19666 regulation.Armour has cable and prevents that mouse stings bad function.Cable has radially that the function cable of waterproof has ultraviolet radiation preventing function, and behind the anti-day light aging test 1008h, the rate of change of tensile strength, elongation at break that records oversheath is between 25% ~+25%.

Description of drawings

Below in conjunction with drawings and Examples the utility model is done a step explanation.

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

Embodiment

The utility model adopts following structure: 1, a kind of subway special DC connection is jumped cable, comprise that many twisted pair wires are to conductor 1, it is characterized in that: conductor 1 is coated with insulating barrier 2, be insulated how outer for inner covering 3 that layer 2 coats, be provided with copper strips screen 4, belting layer 5 and armour 6 between inner covering 3 and the oversheath 7 successively conductor 1.

The main technique index of this product is as follows:

1, conductor

Conductor 1 is carried out GB/T 3956-1997 standard, and copper wire is drawn by continuous annealing big drawing machine between special cable car, the burr of bright and clean, the no greasy dirt of wire surface, flawless and damage insulation.

2, insulating barrier

Insulating barrier adopts one-step silane cross-linked polyethylene to insulate, and insulation thickness meets the regulation of GB9330-88 standard, extrudes on the one-step method extruder.

3, inner covering

Inner covering 3 adopts the low-smoke non-halogen flame-retardant inserts of high oxygen index, extrudes on Φ 65 extruders.

4, screen

Screen 4 employings one layer thickness is that the soft copper band of 0.06mm is overlapping wrapped on cable core, and its rate of putting up is not less than 15%, has guaranteed that the bendability of cable has anti-interference.

5, band

Belting layer 5 meets the regulation of GB9330-88, adopts two-layer low-smoke non-halogen flame-retardant band overlapping wrapped, carries out on cabler.

6, armour

Armour 6 employing two layers of thickness are that the galvanized steel strip gap of 0.2mm is wrapped, and clearance rate is not more than 50% of width of steel band.Interior lamellar spacing is covered by outer steel band, wrapped should be smooth smooth, thickness of strips should meet the regulation of GB9330-88.

7, oversheath

Oversheath 7 adopts low-smoke and halogen-free flame retardant polyolefin jacket material, and thickness meets the regulation of GB9330-88, carries out on Φ 90 extruders.

Claims

1, a kind of subway special DC connection is jumped cable, comprise that many twisted pair wires are to conductor (1), it is characterized in that: conductor (1) is coated with insulating barrier (2), be insulated how outer for inner covering (3) that layer (2) coats, be provided with copper strips screen (4), belting layer (5) and armour (6) between inner covering (3) and the oversheath (7) successively conductor (1).