CN2836186Y

CN2836186Y - Integrated waterproof internal shielded railway digital signal cable

Info

Publication number: CN2836186Y
Application number: CN 200620070078
Authority: CN
Inventors: 应志忠; 陈兵; 沈红妹
Original assignee: TONGDING GROUP CO Ltd
Current assignee: Tongding Interconnection Information Co Ltd
Priority date: 2006-03-07
Filing date: 2006-03-07
Publication date: 2006-11-08
Anticipated expiration: 2016-03-07

Abstract

The utility model relates to a railway digital-signal cable having integrated water-stopping functions, which comprises a cable core which comprises a plurality of groups of signal lines, wherein at least a group of the signal lines are internal shielding quads. Water-stopping yarns and water-stopping factice are filled in gaps between every two signal lines. The outside of the cable core is orderly provided with a third water-stopping belt layer, an inner sheath layer, a second water-stopping belt layer, an aluminum sheath layer, a first water-stopping belt layer, a metal armour layer and an oversheath layer bound on the metal armour layer from inside to outside. Water and moisture can be effectively prevented from entering the cable core from the end surface of the utility model by the water-stopping factice in the cable core. The first water-stopping belt layer and the second water-stopping belt layer on the outside of the cable core can play longitudinal water-stopping functions, the aluminum sheath layer and the inner sheath layer can also play transversal water-stopping functions, and thus the effect of general water stop can be realized to prevent the cable core from aging. The insulation characteristics of the signal lines in the cable core are enhanced, the service life of the utility model is prolonged and the safety of railway digital communication is enhanced.

Description

Railway digital signal cable with integrated water stop function

Technical field

The utility model relates to a kind of internal screening railway digital signal cable.

Background technology

In the prior art; railway digital signal cable comprises cable core; cable core comprises at least one group of inner shield quad; in the cable core arranged outside aluminium sheath layer of shielding action has been arranged, at the metal armouring layer of vertical protection cable core and the external sheath layer of insulation; and because each outer layer of cable core can not play the effect that blocks water comprehensively; so in actual applications; water and moisture still can infiltrate in the cable core from the end face and the surface of cable; cause cable core aging; make that the security reliability of railway digital communication is lower, and can shorten the useful life of cable.

Summary of the invention

The purpose of this utility model provides a kind of railway digital signal cable with integrated water stop function, and it can stop water and moisture to enter in the cable core comprehensively.

The technical solution of the utility model is: a kind of railway digital signal cable with integrated water stop function, comprise cable core, described cable core comprises many group holding wires, at least one group of described holding wire is the inner shield quad, be filled with greasy for preventing water in the space between described each holding wire, be disposed with inner restrictive coating, second water blocking tape layer, aluminium sheath layer, first water blocking tape layer, metal armouring layer from inside to outside, be bonded in the external sheath layer on the described metal armouring layer in the described cable core outside.

Also be provided with the 3rd water blocking tape layer between described cable core and the inner restrictive coating, described the 3rd water blocking tape layer vertically wraps on the cable core.

Described inner shield quad comprise four mutually stranded single lines, vertically wrap in described four single lines outside the internal shield of one deck at least, be bonded in the plastic sheath layer in the described internal shield outside, be filled with water blocking yarn in the space between described each single line.

The utility model compared with prior art has following advantage: the 3rd water blocking tape layer in the greasy for preventing water in the cable core, the water blocking yarn in the inner shield quad and the cable core outside can prevent effectively that sealing and moisture enter in the cable core from the end face of cable, and first water blocking tape layer, second water blocking tape layer in the cable core outside can play the effect that vertically blocks water, aluminium sheath layer and inner restrictive coating also can play horizontal resistance effect simultaneously, thereby can realize the effect that comprehensively blocks water, to prevent that cable core is aging, prolong the useful life of cable, and improve the security reliability of railway digital communication.

Description of drawings

Accompanying drawing 1 is a main cutaway view of the present utility model;

Accompanying drawing 2 is the main cutaway view Amplified image of inner shield quad of the present utility model;

Wherein: 1, external sheath layer; 2, metal armouring layer; 3, first water blocking tape layer; 4, aluminium sheath layer; 5, second water blocking tape layer; 6, inner restrictive coating; 7, the 3rd water blocking tape layer; 8, inner shield quad; 9, greasy for preventing water; 10, twisted pair wire; 11, plastic sheath layer; 12, internal shield; 13, polyester is pricked cotton yarn tape; 14, water blocking yarn; 15, single line.

Embodiment

Shown in accompanying drawing 1, a kind of railway digital signal cable with integrated water stop function, comprise cable core, described cable core comprises many group holding wires, at least one group of described holding wire is inner shield quad 8, cable core also comprises twisted pair wire 10 (common twisted wire), is commonly used to the transmission of monitoring signal, is filled with greasy for preventing water 9 in the space between described each holding wire.Be disposed with inner restrictive coating 6, second water blocking tape layer 5, aluminium sheath layer 4, first water blocking tape layer 3, metal armouring layer 2 from inside to outside, be bonded in the external sheath layer 1 on the described metal armouring layer 2 in the described cable core outside.

Also be provided with the 3rd water blocking tape layer 7 between described cable core and the inner restrictive coating 6, described the 3rd water blocking tape layer 7 vertically wraps on the cable core.

2 pairs of cable core of metal armouring layer shield; can prevent that animal from nibbling or construction tool scratches and cause the cable core of cable exposed outside; external sheath layer 1 is bonded on the metal armouring layer 2 by the processing mode of extrusion molding; external sheath layer 1 is made by insulating plastics material, plays the insulation that strengthens cable and effect such as corrosion-resistant.4 main shielding action of aluminium sheath layer, also play the effect that laterally blocks water, first water blocking tape layer 3, second water blocking tape layer 5, the 3rd water blocking tape layer 7 all have the characteristic of moisture expantion, thereby play vertical resistance effect, and greasy for preventing water 9 in the cable core and the water blocking yarn 14 in the inner shield quad 8 are further with water and moisture from end baffle outside, thereby realize the purpose that comprehensively blocks water, to ensure the signal normal transmission of cable, and prevent that cable core is aging, prolong the useful life of cable.

Shown in accompanying drawing 2, described inner shield quad 8 comprise four mutually stranded single lines 15, vertically wrap in described four single line 15 outsides the internal shield of one deck at least 12, be bonded in the plastic sheath layer 11 in described internal shield 12 outsides, be filled with water blocking yarn 14 in the space between described each single line 15.Four single line 15 stranded backs are adopted polyester to prick cotton yarn tape 13 and are tied up; at four single lines, 15 arranged outside internal shields 12; internal shield 12 is made by metal material; has function of shielding; the plastic sheath layer 11 that the insulation protection effect has been arranged in internal shield 12 arranged outside; water blocking yarn 14 between each single line 15 can intercept water and moisture in the outside of inner shield quad 8, further plays a part to block water comprehensively.

Claims

1, a kind of railway digital signal cable with integrated water stop function, comprise cable core, described cable core comprises many group holding wires, at least one group of described holding wire is inner shield quad (8), it is characterized in that: be filled with greasy for preventing water (9) in the space between described each holding wire, be disposed with inner restrictive coating (6), second water blocking tape layer (5), aluminium sheath layer (4), first water blocking tape layer (3), metal armouring layer (2) from inside to outside, be bonded in the external sheath layer (1) on the described metal armouring layer (2) in the described cable core outside.

2, the railway digital signal cable with integrated water stop function according to claim 1, it is characterized in that: also be provided with the 3rd water blocking tape layer (7) between described cable core and the inner restrictive coating (6), described the 3rd water blocking tape layer (7) vertically wraps on the cable core.

3, the railway digital signal cable with integrated water stop function according to claim 1, it is characterized in that: described inner shield quad (8) comprise four mutually stranded single lines (15), vertically wrap in described four single lines (15) outsides the internal shield of one deck at least (12), be bonded in the plastic sheath layer (11) in described internal shield (12) outside, be filled with water blocking yarn (14) in the space between described each single line (15).