CN2456271Y

CN2456271Y - Numeral singnal cables for railway

Info

Publication number: CN2456271Y
Application number: CN 00268966
Authority: CN
Inventors: 梁斌; 姜波
Original assignee: Tianshui Railway Cable Factory; Jiaozuo Railway Cable Factory
Current assignee: Jiaozuo Railway Cable Co Ltd; Tianshui Railway Cable Co Ltd
Priority date: 2000-12-31
Filing date: 2000-12-31
Publication date: 2001-10-24
Anticipated expiration: 2010-12-31

Abstract

The utility model relates to a numeral signal cable for railways, composed of an outer protective layer and an insulating wire group. Each of the insulating wires of the insulating wire group is composed of an insulating layer and a metal core wire, and the insulating layer of the insulating wire is composed of an outer cortical layer, a middle foaming layer and an inner cortical layer; the middle foaming layer has higher foaming degree, and thus the working capacity of the four wire groups made of the insulating wires is greatly reduced so as to reduce the attenuation constant of line transmission. The utility model can transmits analogue signals, digital signals, compatible signals and communication information.

Description

Railway digital signal cable

The utility model relates to a kind of railway signal transmission facilities, especially for the railway signal cable of transmission railway signal information.

Existing railway signal cable is to constitute by multi-form external protection with based on the four insulated wire groups of thoroughly doing away with the thread quad of edge; the insulated wire of its insulated wire group is to be made of polyethylene layer and metal core wire, and this signal cable is applicable to the control circuit of transmission railway signal, audio signal or automatic signalling.At present, owing to railway COMPUTER DETECTION, computer station interlocking, and railway numeral track circuit The Application of Technology, transmit above-mentioned railway communication information by railway signal cable and just necessitate.And existing railway signal cable can not be realized signal and the compatible purpose of communication information transmission because of not having the railway communication technical performance.

The purpose of this utility model provides a kind of railway digital signal cable, and it has railway signal and the compatible technical performance of communication information transmission, has overcome the deficiency that existing railway signal cable exists.

The utility model is achieved in that this railway digital signal cable is to constitute by external protection with based on the insulated wire group of quad; the insulated wire of insulated wire group is to be made of insulating barrier and metal core wire; the insulating barrier of insulated wire is a three-decker; ecto-entad is followed successively by exodermis; middle foaming layer; endodermis; foaming layer is the insulating barrier that adopts foaming technique to make with insulating material in the middle of it; in this insulating barrier, have many close and mutual disconnected foam holes; when this foaming layer has very high foam degrees; can make by the thread quad mutual capacitance of insulation and descend significantly; and circuit transmission attenuation constant is descended, thereby possesses the necessary technology performance of communications.

The utility model has the advantages that, but transmission of analogue signal and digital signal, compatible signal and communication information transmission.

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the utility model insulated wire structure chart.

Fig. 2 is the 16 core digital signal cable structure charts that the utlity model has 16 insulated wires.

Fig. 3 is the 30 core digital signal cable structure charts that the utlity model has 30 insulated wires.

Fig. 4 is the 37 core digital signal cable structure charts that the utlity model has 37 insulated wires.

According to Fig. 1.The structure of the utility model insulated wire is followed successively by from outside to inside: by the insulating barrier that exodermis 1, middle foaming layer 2 and endodermis 3 are formed, copper core 4.Exodermis 1 is made by the high density polyethylene (HDPE) Insulation Material, and endodermis 3 is made by the linear polyethylene material.According to Fig. 2, the utility model overall structure ecto-entad is: by oversheath 5, armour 6, extrude the external protection that inner cushion layer 7, belting layer 8 are formed, and the star quad 9 of 4 groups of different colour codes, quad 9 is made up of 4 insulated wires.According to Fig. 3, the utility model overall structure ecto-entad is: oversheath 5, armour 6, extrude the external protection that inner cushion layer 7, the bonding sheath 10 of plastic-aluminum, belting layer 8 formed, the insulated single wire 11 of 9,2 different colour codes of star quad of 7 groups of different colour codes.According to Fig. 4; overall structure ecto-entad of the present utility model is: the external protection of being made up of oversheath 5, armour 6, wrapped inner cushion layer 12, aluminium sheath 13, thermal insulation layer 14, belting layer 8; the star quad 9 of 7 groups of different colour codes; 3 groups of different colour codes to line group 15; each is made up of 2 insulated wires the line group, the insulated single wire 11 of 3 different colour codes.

Claims

1. a railway digital signal cable is made of external protection and insulated wire line group, and it is characterized in that: the insulating barrier of described insulated wire is a three-decker, and ecto-entad is followed successively by: exodermis (1), middle foaming layer (2) and endodermis (3).

2. railway digital signal cable according to claim 1 is characterized in that: in the insulating barrier three-decker of described insulated wire, exodermis (1) is to be made by the high density polyethylene (HDPE) Insulation Material, and endodermis (3) is to be made by the linear polyethylene Insulation Material.