CN210295995U

CN210295995U - High-flame-retardant green environment-friendly cable for B1-grade electrified railway

Info

Publication number: CN210295995U
Application number: CN201921327288.8U
Authority: CN
Inventors: 郑建平; 张中云; 张仲韬; 张峰; 连钧宇; 郭卫红
Original assignee: Jiangsu Hengtong Power Cable Co Ltd
Current assignee: Jiangsu Hengtong Power Cable Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-04-10
Anticipated expiration: 2029-08-15

Abstract

The utility model discloses a B1 level electrified railway is with high fire-retardant green cable, including at least one conductor, the conductor outside cladding has the conductor shielding layer, the conductor shielding layer outside is equipped with insulating layer and insulating barrier in proper order, conductor shielding layer, insulating layer and insulating barrier are three-layer coextrusion structure, the winding of insulating barrier outside has the waterproof layer, the outer cladding of waterproof layer has the metallic shield layer, metallic shield layer and waterproof layer carried on the back of the body one side mutually are equipped with fire-resistant insulating layer, the fire-resistant insulating layer outside is equipped with armor and outer jacket from inside to outside in proper order, metallic shield layer, armor and outer jacket are coaxial structure. The utility model discloses have fire-retardant, waterproof, low smoke and zero halogen's characteristic, can lay in places such as underground, tunnel, cable testing bridge or cable pit, transformer station cable intermediate layer that often are soaked by water.

Description

High-flame-retardant green environment-friendly cable for B1-grade electrified railway

Technical Field

The utility model relates to a cable especially relates to a B1 level electrified railway is with high fire-retardant green cable.

Background

The high-flame-retardant green environment-friendly cable for the B1-grade electrified railway is used for a traction power supply system of the electrified railway and is mainly used as a feeder line from a traction substation to a contact net and a return line from a running rail to the traction substation; and the single-phase alternating current after conversion is transmitted to a contact network, and the loop current in the traveling rail is led into a main transformer of the traction substation. The existing electrified railway single-phase alternating-current cable only considers the bundled flame-retardant characteristic of a cable body, does not consider the characteristics of heat release characteristic, smoke toxicity, droppings flammability and the like of the cable during combustion under the fire condition, and cannot meet the higher requirements of urban rail transit departments on fire safety. Therefore, it is an endeavor of those skilled in the art to provide a cable with low heat release and no dripping.

Disclosure of Invention

The utility model aims at providing a B1 level is high fire-retardant green cable for electric railway, this B1 level is high fire-retardant green cable for electric railway have fire-retardant, waterproof, low smoke and zero halogen's characteristic, can lay in places such as underground, tunnel, cable testing bridge or cable pit, the transformer station cable intermediate layer that often is soaked by water.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a high-flame-retardant green environment-friendly cable for a B1-grade electrified railway comprises a conductor, wherein a conductor shielding layer is wrapped outside the conductor, an insulating layer and an insulating shielding layer are sequentially arranged outside the conductor shielding layer, the insulating layer and the insulating shielding layer are of a three-layer co-extrusion structure, a waterproof layer is wrapped outside the insulating shielding layer, a metal shielding layer is wrapped outside the waterproof layer, a fireproof heat-insulating layer is arranged on one side, opposite to the waterproof layer, of the metal shielding layer, an armor layer and an outer protection layer are sequentially arranged outside the fireproof heat-insulating layer from inside to outside, and the metal shielding layer, the armor layer and the outer protection layer are of a coaxial structure; the fire-resistant insulating layer includes fire-retardant fire-resistant covering and insulating layer, fire-retardant fire-resistant covering sets up between metallic shield layer and insulating layer around the covering.

The further improved scheme in the technical scheme is as follows:

1. in the above scheme, the insulating layer is a crosslinked polyethylene insulating layer.

2. In the above scheme, the waterproof layer is a semiconductive water-blocking tape.

3. In the scheme, the metal shielding layer adopts a copper wire sparse winding structure, and the sparse winding copper wire is externally reversely wound by a copper strip.

4. In the scheme, the heat insulation layer is made of ceramic polyolefin material.

5. In the above scheme, the armor layer is an aluminum wire armor layer.

6. In the above scheme, the outer protective layer is a halogen-free polyolefin sheath material.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

the utility model discloses B1 level is high fire-retardant green cable for electric railway has fire-retardant waterproof characteristic, and it realizes the B1 level fire-retardant of cable through set up fire-retardant fire-resistant around covering, insulating layer, armor and outer jacket outside metallic shield, winds the structure of package semiconduction water-blocking tape outside the insulating shield layer simultaneously and makes the cable have radial waterproof characteristic; furthermore, the heat insulation layer is made of ceramic polyolefin materials, so that the external high temperature can be isolated, the mechanical strength of the cable after combustion is enhanced, and the conductor in the cable can be prevented from being damaged; furthermore, the outer protective layer is made of low-smoke halogen-free polyolefin materials, so that the cable has the characteristics of low smoke and halogen, the cable cannot drip after burning, and the pollution to the environment can be reduced.

Drawings

FIG. 1 is the utility model discloses electric railway is with high fire-retardant green cable structure sketch map.

In the above drawings: 1. a conductor; 2. a conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. a waterproof layer; 6. a metal shielding layer; 7. a flame-retardant and fire-resistant wrapping layer; 8. a thermal insulation layer; 9. an armor layer; 10. an outer jacket.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: a high-flame-retardant green environment-friendly cable for a B1-grade electrified railway comprises a conductor 1, wherein a conductor shielding layer 2 is coated on the outer side of the conductor 1, an insulating layer 3 and an insulating shielding layer 4 are sequentially arranged on the outer side of the conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are of a three-layer co-extrusion structure, a waterproof layer 5 is wound on the outer side of the insulating shielding layer 4, a metal shielding layer 6 is coated on the outer side of the waterproof layer 5, a fireproof heat-insulating layer is arranged on one side, opposite to the waterproof layer 5, of the metal shielding layer 6, an armor layer 9 and an outer protective layer 10 are sequentially arranged on the outer side of the fireproof heat-insulating layer from inside to outside, and the metal shielding layer 6, the; fire-resistant insulating layer is including fire-retardant fire-resistant covering 7 and insulating layer 8, fire-retardant fire-resistant covering 7 sets up between metal shielding layer 6 and insulating layer 8 around the covering.

The heat insulation layer 8 is made of ceramic polyolefin material.

The armor layer 9 is an aluminum wire armor layer.

The outer protective layer 10 is a halogen-free polyolefin sheath material.

Example 2: a high-flame-retardant green environment-friendly cable for a B1-grade electrified railway comprises a conductor 1, wherein a conductor shielding layer 2 is coated on the outer side of the conductor 1, an insulating layer 3 and an insulating shielding layer 4 are sequentially arranged on the outer side of the conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are of a three-layer co-extrusion structure, a waterproof layer 5 is wound on the outer side of the insulating shielding layer 4, a metal shielding layer 6 is coated on the outer side of the waterproof layer 5, a fireproof heat-insulating layer is arranged on one side, opposite to the waterproof layer 5, of the metal shielding layer 6, an armor layer 9 and an outer protective layer 10 are sequentially arranged on the outer side of the fireproof heat-insulating layer from inside to outside, and the metal shielding layer 6, the; fire-resistant insulating layer is including fire-retardant fire-resistant covering 7 and insulating layer 8, fire-retardant fire-resistant covering 7 sets up between metal shielding layer 6 and insulating layer 8 around the covering.

The insulating layer 3 is a crosslinked polyethylene insulating layer.

The waterproof layer 5 is a semiconductive water-blocking tape.

The metal shielding layer 6 is of a copper wire sparse winding structure, and a copper strip is adopted outside the sparse winding copper wire for reverse bundling winding.

When the high-flame-retardant green environment-friendly cable for the B1-grade electrified railway is adopted, the cable has flame-retardant and waterproof properties, the B1-grade flame retardance of the cable is realized by arranging a flame-retardant and fire-resistant wrapping layer, a heat-insulating layer, an armor layer and an outer protective layer outside a metal shielding layer, and meanwhile, a semi-conductive water blocking tape structure is wrapped outside the insulating shielding layer, so that the cable has radial waterproof properties; furthermore, the heat insulation layer is made of ceramic polyolefin materials, so that the mechanical strength of the cable after combustion is enhanced, and the conductor in the cable can be prevented from being damaged; in addition, the outer protective layer is made of low-smoke halogen-free polyolefin materials, so that the cable has the characteristics of low smoke and halogen free, and can be laid underground, tunnels, cable bridges, cable ditches frequently soaked by water, cable interlayers of substations and other places.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A high fire-retardant green environmental protection cable for B1 level electrified railway, which is characterized in that: the novel coaxial cable comprises a conductor (1), wherein a conductor shielding layer (2) is coated on the outer side of the conductor (1), an insulating layer (3) and an insulating shielding layer (4) are sequentially arranged on the outer side of the conductor shielding layer (2), the insulating layer (3) and the insulating shielding layer (4) are of a three-layer co-extrusion structure, a waterproof layer (5) is wound on the outer side of the insulating shielding layer (4), a metal shielding layer (6) is coated on the outer side of the waterproof layer (5), a fireproof heat insulation layer is arranged on the side, opposite to the waterproof layer (5), of the metal shielding layer (6), an armor layer (9) and an outer protection layer (10) are sequentially arranged on the outer side of the fireproof heat insulation layer from inside to outside, and the metal shielding layer (6), the armor layer; fire-resistant insulating layer is including fire-retardant fire-resistant covering (7) and insulating layer (8) of wrapping, fire-retardant fire-resistant covering (7) of wrapping set up between metallic shield layer (6) and insulating layer (8) of wrapping.

2. The high flame retardant green environmental protection cable for B1 grade electrified railway of claim 1, wherein: the insulating layer (3) is a cross-linked polyethylene insulating layer.

3. The high flame retardant green environmental protection cable for B1 grade electrified railway of claim 1, wherein: the waterproof layer (5) is a semi-conductive water-blocking tape.

4. The high flame retardant green environmental protection cable for B1 grade electrified railway of claim 1, wherein: the metal shielding layer (6) adopts a copper wire sparse winding structure, and a copper strip is adopted outside the sparse winding copper wire for reverse bundling winding.

5. The high flame retardant green environmental protection cable for B1 grade electrified railway of claim 1, wherein: the heat insulation layer (8) is made of ceramic polyolefin material.

6. The high flame retardant green environmental protection cable for B1 grade electrified railway of claim 1, wherein: the armor layer (9) is an aluminum wire armor layer.

7. The high flame retardant green environmental protection cable for B1 grade electrified railway of claim 1, wherein: the outer protective layer (10) is a halogen-free polyolefin sheath material.