CN214897763U - Cable with excellent flame retardant property for shielding railway digital signals - Google Patents

Abstract

The utility model provides a good cable of shielding railway digital signal of fire behaviour, including shielding unit, the second cable core, first fire-retardant winding band, the insulating layer, the coated aluminum sheath, fire-retardant oxygen layer that separates, the inner liner, the fire-retardant winding band of second and protecting material cover, the second cable core is formed by four groups of shielding unit transposition, fire-retardant winding band cladding is outside in the second cable core, the insulating layer cladding is outside in fire-retardant winding band, coated aluminum sheath cladding is outside in the insulating layer, fire-retardant oxygen layer cladding is outside coated aluminum sheath, the inner liner cladding is outside in fire-retardant oxygen layer that separates, the fire-retardant winding band cladding of second is outside in the armor, protecting material cover cladding is outside in the fire-retardant winding band of second, the utility model discloses have halogen-free, low cigarette, low toxicity, fire behaviour is high, the fire-retardant rating of cable has been improved, the security performance of product has been strengthened, can realize 1MHz (analog signal), 2Mbit/s (digital signal) and rated voltage of 750V or 1100V AC and the following system control information and electric energy transmission.

Description

Cable with excellent flame retardant property for shielding railway digital signals

Technical Field

The utility model relates to a railway along the line, subway, light rail, railway signal system in the jointing equipment field between relevant equipment and the controlling means, especially relate to a fire behaviour is good shields railway digital signal's cable.

Background

With the continuous increase of railway construction and high-speed rail opening operation, the rapid increase of newly-added operation mileage and the continuous expansion of line network scale, the railway traffic safety pressure and the challenge are increased, the railway has higher specification requirements on the internal shielding railway digital signal cable for the power supply system and the signal system, in particular to the fire safety combustion performance grade, and no specification specially aiming at the combustion performance grade requirement of the internal shielding railway digital signal cable B1 exists at present.

In particular, the railway system is a complex system which involves various technical fields, consists of various devices, various software and hardware and various facilities, has great social influence, and the safety of the complex system is always the most concerned focus of the railway system. The signal cables used by the railway are various in variety and quantity, the stability and the safety of railway traffic operation are directly influenced, and the design and the type selection of the signal cables of a signal and power supply system are very important.

In the past, the cable flame-retardant classification of the signal and power supply system of the domestic railway is classified into A, B, C, D and the like according to GB/T19666-2005 fire-retardant and fire-resistant wire and cable general rules. While the standard of the digital signal cable TB/T3100.5-2017 railway digital signal cable for the internally shielded railway only stipulates the requirement that the flame retardant grade is C, and with the improvement of safety consciousness of people, the common flame retardant cable for the C grade can not meet the requirement of the digital signal cable for the railway internally shielded railway.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a cable with excellent flame retardant property for shielding digital signals of railways, so as to solve the problems mentioned in the above background art.

Based on the above purpose, the utility model provides a cable of good fire retardant property shielding railway digital signal, including shielding unit, second cable core, first fire-retardant around band, insulating layer, coating aluminium sheath, fire-retardant oxygen barrier layer, inner liner, second fire-retardant around band and protecting jacket, the shielding unit includes shielding module, first cable core, indulges and wraps the reticulate area, indulges a wrinkle pure copper strips and PE around the band, the shielding unit includes conductor and insulating layer, the insulating layer cladding is outside the conductor, first cable core is twisted by four groups of shielding module and forms, indulge and wrap the reticulate area cladding in the first cable core outside, indulge and wrap the wrinkle pure copper strips cladding in indulging and wrap the reticulate area outside, PE is wrapped the reticulate area cladding in indulging the wrinkle pure copper strips outside, the second cable core is twisted by four groups of shielding unit and forms, first fire-retardant tape cladding is outside the second cable core, the insulating layer cladding is outside in first fire-retardant package band, it is outside in the insulating layer to coat the aluminum sheath cladding, fire-retardant oxygen layer cladding that separates is outside in coating the aluminum sheath, the inner liner cladding is outside in fire-retardant oxygen layer that separates, the fire-retardant package band cladding of second is outside in the inner liner, the cladding of protecting material cover is outside in the fire-retardant package band of second.

Preferably, the insulating layer is made of skin-foam-skin three-layer polyethylene.

Preferably, the PE wrapping band is internally provided with a drainage wire.

Preferably, the first flame-retardant wrapping tape and the second flame-retardant wrapping tape are halogen-free low-smoke flame-retardant wrapping tapes.

Preferably, the heat insulation layer is a polyethylene heat insulation layer.

Preferably, the flame-retardant oxygen-insulating layer is a halogen-free low-smoke flame-retardant oxygen-insulating layer.

Preferably, the outer surface of the inner liner is armored by steel belts.

Preferably, the material protection sleeve is a halogen-free low-smoke flame-retardant material protection sleeve.

From the above, the utility model has the advantages that: 1. the utility model discloses cable insulating layer and inner liner adopt the special high fire-retardant zero halogen low smoke pottery of B1 level to lead to the fact the polyethylene insulation burning to prevent that flame and heat from transmitting cable core the inside, reduce the combustion volume and the calorific capacity of cable, the ceramic package body that the simultaneous combustion formed prevents that oxygen from getting into the cable core the inside, greatly reduced the burning of cable.

2. The surface of the steel belt is wrapped with the halogen-free low-smoke flame-retardant belt, so that the degree of oxygen entering the cable core is further reduced, and the heat of the steel belt is prevented from being uploaded quickly to cause the sheath to be melted and fall off.

3. The sheath adopts dedicated B1 level halogen-free low smoke flame retardant sheath material, has reduced the smoke volume and the heat of burning of cable, and the cable has no halogen simultaneously, low smoke, fire-retardant, characteristics such as low toxicity, and during this cable burning, its heat gived off the total amount also low simultaneously, and the burning carbomorphism is highly little, has improved the security of railway signal cable in sealed environment greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

In the reference symbols: 1. a conductor; 2. an insulating layer; 3. longitudinally wrapping a reticulate pattern belt; 4. longitudinally wrapping a corrugated pure copper strip; 5, wrapping a PE tape; 6. a first flame-retardant wrapping tape; 7. a thermal insulation layer; 8. coating an aluminum sheath; 9. a flame retardant oxygen barrier layer; 10. an inner liner layer; 11. a second flame-retardant wrapping tape; 12. and (5) protecting the material sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should have the ordinary meaning as understood by those having ordinary skill in the art to which the present disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

Referring to fig. 1, a cable with excellent flame retardant property for shielding railway digital signals comprises a shielding unit, a second cable core, a first flame retardant wrapping tape 6, a heat insulating layer 7, a coated aluminum sheath 8, a flame retardant oxygen-isolating layer 9, an inner liner 10, a second flame retardant wrapping tape 11 and a material protecting sleeve 12, wherein the shielding unit comprises a shielding module, a first cable core, a longitudinally wrapped mesh tape 3, a longitudinally wrapped corrugated pure copper tape 4 and a PE wrapping tape 5, the shielding unit comprises a conductor 1 and an insulating layer 2, the insulating layer 2 is wrapped outside the conductor 1, the first cable core is formed by twisting four groups of shielding modules, the longitudinally wrapped mesh tape 3 is wrapped outside the first cable core, the longitudinally wrapped corrugated pure copper tape 4 is wrapped outside the longitudinally wrapped mesh tape 3, the PE wrapping tape 5 is wrapped outside the longitudinally wrapped corrugated pure copper tape 4, the second cable core is formed by twisting four groups of shielding units, first fire-retardant covering in the second cable core outside around band 6, the insulating layer 7 cladding is in first fire-retardant covering band 6 outsidely, 8 cladding in insulating layer 7 outsides of coating aluminum sheath, fire-retardant oxygen layer 9 cladding in 8 outsides of coating aluminum sheath that separate, the cladding of inner liner 10 is in fire-retardant oxygen layer 9 outsides that separate, the fire-retardant covering in inner liner 10 outsides of covering band 11 of second, the cladding of casting cap 12 is in the fire-retardant covering band 11 outsides of second.

As a modification of the scheme, the insulating layer 2 is made of skin-foam-skin three-layer polyethylene.

As the improvement scheme of the scheme, the PE wrapping tape 5 is internally provided with a drainage wire.

As an improvement scheme of the above scheme, the first flame-retardant wrapping tape 6 and the second flame-retardant wrapping tape 11 are both halogen-free low-smoke flame-retardant wrapping tapes.

As a modified solution of the above solution, the heat insulation layer 7 is a polyethylene heat insulation layer 7.

As an improvement of the above scheme, the flame-retardant oxygen-insulating layer 9 is a halogen-free low-smoke flame-retardant oxygen-insulating layer 9.

As a modification of the above, the outer surface of the inner liner 10 is armored with steel tape.

As an improvement of the above scheme, the protective material sleeve 12 is a halogen-free low-smoke flame-retardant protective material sleeve 12.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. A cable with excellent flame retardant property for shielding railway digital signals is characterized by comprising:

a shielding unit including:

a shielding module, the shielding unit including:

a conductor (1); and

the insulating layer (2), the said insulating layer (2) is coated outside the conductor (1);

the first cable core is formed by twisting four groups of shielding modules;

the longitudinally wrapped mesh belt (3) is wrapped outside the first cable core;

the longitudinally-wrapped corrugated pure copper strip (4) is wrapped outside the longitudinally-wrapped anilox strip (3); and

the PE wrapping tape (5), and the PE wrapping tape (5) is wrapped outside the longitudinally-wrapped corrugated pure copper tape (4);

the second cable core is formed by twisting four groups of shielding units;

the first flame-retardant wrapping tape (6), wherein the first flame-retardant wrapping tape (6) is wrapped outside the second cable core;

the heat insulation layer (7), the heat insulation layer (7) is coated outside the first flame-retardant wrapping tape (6);

the coating aluminum sheath (8), the coating aluminum sheath (8) is coated outside the heat insulation layer (7);

the flame-retardant oxygen-isolating layer (9), the flame-retardant oxygen-isolating layer (9) is coated outside the coated aluminum sheath (8);

the inner liner layer (10), the inner liner layer (10) is coated outside the flame-retardant oxygen-insulating layer (9);

the second flame-retardant wrapping tape (11), wherein the second flame-retardant wrapping tape (11) is wrapped outside the lining layer (10); and

and the protective sleeve (12), wherein the protective sleeve (12) is coated outside the second flame-retardant wrapping tape (11).

2. The cable for shielding railway digital signals with excellent flame retardant property according to claim 1, wherein the insulating layer (2) is made of skin-foam-skin three-layer polyethylene.

3. The cable with excellent flame retardant property for shielding railway digital signals as claimed in claim 1, wherein the PE wrapping tape (5) is internally provided with a drainage wire.

4. The cable with excellent flame retardant property for shielding the digital signals of the railway according to claim 1, wherein the first flame retardant wrapping tape (6) and the second flame retardant wrapping tape (11) are both halogen-free low-smoke flame retardant wrapping tapes.

5. The cable with excellent flame retardant property for shielding railway digital signals according to claim 1, wherein the thermal insulation layer (7) is a polyethylene thermal insulation layer (7).

6. The cable with excellent flame retardant property for shielding railway digital signals according to claim 1, wherein the flame retardant oxygen barrier layer (9) is a halogen-free low-smoke flame retardant oxygen barrier layer (9).

7. The cable for shielding digital signals of railways with excellent flame retardant property according to claim 1, characterized in that the outer surface of the inner liner (10) is armored by steel tape.

8. The cable with excellent flame retardant property for shielding railway digital signals according to claim 1, characterized in that the sheath (12) is a halogen-free low-smoke flame retardant sheath (12).

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