CN202049800U - Symmetrical communication cable for fireproof ship - Google Patents

Abstract

The utility model discloses a fire-resistant symmetrical communication cable for ships, which comprises four conductor groups and inner filling cores, and is characterized in that: the inner filling cores within the four conductor groups are centered and distributed symmetrically in an annular manner, and the four conductor groups are respectively composed of two Tinned copper wire conductors wrapped with refractory layer on the outside are twisted, four conductor groups are wrapped with insulating layers, four conductor groups are wrapped with inner sheath layers, and several outer sheath layers are arranged between the inner sheath layer and the insulating layer. Filling core, several outer filling cores are made of thin steel wire, and the outer side of the inner sheath layer is wrapped with an armor layer and an outer sheath layer in turn. The utility model adopts a compact structure; the conductor is wrapped with a refractory layer, and the special structure of the refractory layer enhances the refractory characteristics and plays a shielding effect; the inner and outer sides of the conductor group are respectively provided with inner and outer filler cores to enhance the resistance of the cable. Tensile strength, at the same time, the end impedance, impedance, attenuation constant, and crosstalk performance of the cable all meet the actual work requirements.

Description

A fire-resistant symmetrical communication cable for ships

Technical field:

The utility model relates to the field of marine cables, in particular to a fire-resistant symmetrical communication cable for ships.

Background technique:

Communication cable refers to the cable used for short-distance audio communication and long-distance high-frequency carrier and digital communication and signal transmission. It is one of the five major cable products in my country. According to the purpose and scope of use of communication cables, it can be divided into six series of products, namely, local communication cables (including paper insulated local telephone cables, polyolefin insulated polyolefin sheathed local telephone cables), long-distance symmetrical cables (including paper insulated local telephone cables) Insulated high and low frequency long-distance symmetrical cables, copper core foam polyethylene high and low frequency long-distance symmetrical cables and digital transmission long-distance symmetrical cables), coaxial cables (including small coaxial cables, medium coaxial and micro coaxial cables), submarine cables (can be divided into Symmetrical submarine and coaxial submarine cables), optical fiber cables (including traditional cable type, ribbon array type and skeleton type), radio frequency cables (including symmetrical radio frequency and coaxial radio frequency).

Although there are certain differences in the manufacturing process of different cables, they have commonalities in their overall processing methods. In order to ensure the stable size of the cable structure and good electrical performance, the production sequence of the cable is carried out from the inside to the outside according to its structure. The entire manufacturing process is divided into the manufacture of insulated cores, stranding of wire groups, manufacture of coaxial pairs, cabling process, drying of cable cores, manufacture of cable metal sheaths and outer sheaths. the

There are many and high electrical technical indicators for communication cables. General metal cables have requirements such as wire resistance, insulation resistance, working capacitance, insulation strength, and unbalanced capacitance. For long-distance and coaxial cables, in addition to the above requirements, there are also special requirements such as terminal impedance, impedance non-uniformity, attenuation constant, and crosstalk. the

Aiming at the fact that the fire-resistant performance, tensile performance, impedance, crosstalk and other performances of the original cables cannot meet the actual work requirements, the utility model adopts several conductor groups symmetrically arranged, and the structure is compact; the conductor is wrapped with a fire-resistant layer—using two layers There is a layer of tinned steel wire braided into a net shape between the fire-resistant mica tapes, which enhances the fire-resistant characteristics and plays a shielding effect; the inner and outer sides of the conductor group are respectively equipped with inner and outer filler cores to enhance the tensile resistance of the cable Strength, so that the cable can maintain the integrity of the circuit for a certain period of time in a combustion environment or maintain normal operation under specified flame conditions. the

Utility model content:

The purpose of this utility model is to provide a fire-resistant symmetrical communication cable for ships, which is suitable for signal transmission and control systems in marine telecommunications, electronic computers, and information processing equipment, and improves the fire-resistant, stretch-resistant, and shielding properties of the cable.

The technical scheme of the utility model is as follows:

The fire-resistant symmetrical communication cable for ships includes four conductor groups and inner filler cores. It is characterized in that: the four conductor groups are distributed in a symmetrical ring around the center of inner filler cores made of glass filaments and flame-retardant glass fibers. The four conductor groups are respectively composed of two tinned copper wire conductors wrapped with a refractory layer. The resistivity of the tinned copper wire conductor is less than 0.017240Ω.mm ² /m at 20°C. The refractory layer is composed of Two layers of refractory mica tapes are intermingled with a layer of tinned steel wire braided into a net shape, and the four conductor groups are respectively wrapped with an insulating layer, and the outside of the four conductor groups is wrapped with an inner sheath layer , several outer filler cores are arranged between the inner sheath layer and the insulating layer, and the outer filler cores are thin steel wires, and the outer side of the inner sheath layer is wrapped with an armor layer and an outer sheath in turn. layer.

The fire-resistant symmetrical communication cable for ships is characterized in that the insulating layer is made of cross-linked polyethylene. the

The fire-resistant symmetrical communication cable for ships is characterized in that: the armor layer is made of galvanized steel wire braid. the

The utility model has the advantages of:

The utility model adopts a symmetrical arrangement of several conductor groups, and has a compact structure; the conductor is wrapped with a refractory layer—two layers of refractory mica tapes are intermingled with a layer of tinned steel wire woven into a mesh, which enhances the refractory characteristics and at the same time plays an important role. Shielding effect; the inside and outside of the conductor group are respectively equipped with inner and outer filler cores to enhance the tensile strength of the cable. At the same time, the end impedance, impedance, attenuation constant and crosstalk performance of the cable all meet the actual work requirements.

Description of drawings:

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

Detailed ways:

Fire-resistant symmetrical communication cable for ships, including four conductor groups 1, inner filler core 2, four conductor groups 1, inner filler core 2 made of glass fiber and flame-retardant glass fiber as the center symmetrical annular distribution, four conductors Group 1 is composed of two twisted tinned copper wire conductors 4 wrapped with a refractory layer 3 on the outside. The resistivity of the tinned copper wire conductors is less than 0.017240Ω.mm ² /m at 420°C. A layer of tinned steel wire braided into a net shape is intertwined between them, and the four conductor groups 1 are respectively wrapped with an insulating layer 5, and the outer sides of the four conductor groups 1 are wrapped with an inner sheath layer 6, and the inner sheath layer 6 and There are several outer filler cores 7 between the insulating layers 5, and the outer filler cores 7 are made of thin steel wires. The outer side of the inner sheath layer 6 is successively wrapped with an armor layer 8 and an outer sheath layer 9. The material of the insulating layer 5 is alternating Polyethylene, and the armor layer 8 adopts galvanized steel wire braiding to form.

Claims (3)

1. fire-resistant symmetrical expression telecommunication cable peculiar to vessel, comprise four conductor groups, in fill out core, it is characterized in that: described four conductor groups with glass fiber and flame retardant type glass fibre be mixed and made in to fill out core be center symmetrical expression annular spread, described four conductor groups constitute by the tinned copper wire conductor of two outside parcel flame retardant coatings is stranded respectively, and resistivity is less than 0.017240 Ω during 20 ℃ of tinned copper wire conductors. mm ²/ m, described flame retardant coating weaves by being mingled with one deck between the two-layer fire-resistant isinglass belt that webbed tin plated steel wire is wrapped to be constituted, described four conductor groups are enclosed with insulating barrier outward respectively, described four conductor groups outside is enclosed with inner restrictive coating, be provided with several outer cores of filling out between described inner restrictive coating and the insulating barrier, described several outer core of filling out adopts finer wire, and the described inner restrictive coating outside is enclosed with armour, external sheath layer successively.

2. fire-resistant symmetrical expression telecommunication cable peculiar to vessel according to claim 1 is characterized in that: it is crosslinked polyethylene that described insulating barrier adopts material.

3. fire-resistant symmetrical expression telecommunication cable peculiar to vessel according to claim 1 is characterized in that: described armour adopts the zinc-coated wire braiding to constitute.

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