CN218038620U

CN218038620U - Cable for special track traffic

Info

Publication number: CN218038620U
Application number: CN202221932728.4U
Authority: CN
Inventors: 何军涛; 赵树磊; 顾倩倩; 唐敏; 赵飞
Original assignee: Shanghai Nanda Group Zhejiang Cable Co ltd
Current assignee: Shanghai Nanda Group Zhejiang Cable Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-12-13
Anticipated expiration: 2032-07-22

Abstract

The utility model discloses a cable for special track traffic, which comprises a cable core, a protective layer, a fireproof layer and an outer sheath; the protective layer comprises a buffer layer and a water-resistant layer; the periphery of the cable core is sequentially coated with a buffer layer, a water-blocking layer, a fireproof layer and an outer sheath; this scheme is through setting up the multilayer inoxidizing coating, can make cable wholeness can be high, and applicable in the track traffic that is in different topography, has improved the suitability of cable greatly.

Description

Cable for special track traffic

Technical Field

The utility model relates to the technical field of cables, concretely relates to cable for special track traffic.

Background

Along with the acceleration of track traffic construction pace, the railway operation mileage increases, has driven the demand of track traffic equipment, and the electric wire and cable demand also rises thereupon, and construction such as subway interval tunnel, subway station, equipment fixing, fire control is flourishing to the power cable demand.

The method has the advantages that due to the limitations of terrain factors, economic factors and the like, the track traffic uses the tunnel to avoid complex terrain, so that the space required by the tunnel and the illumination wires and cables for the subway station is huge; the southern and northern climates and environmental factors have different characteristic requirements on the cable.

Therefore, it is an urgent need to provide a cable for rail transit with high applicability.

SUMMERY OF THE UTILITY MODEL

The technical problem that the suitability is not high exists to current cable for special type track traffic, the utility model aims to provide a cable for special type track traffic, its cable wholeness can be high, and is applicable in the track traffic that is in different topography, has improved the suitability of cable greatly, has overcome the problem that prior art exists well.

In order to achieve the purpose, the utility model provides a cable for special track traffic, which comprises a cable core, a protective layer, a fireproof layer and an outer sheath; the protective layer comprises a buffer layer and a water-resistant layer; the cable core periphery wraps the buffer layer, the water-blocking layer, the fireproof layer and the outer sheath in sequence.

Further, the cable core comprises a conductor and an insulating layer; the insulating layer is coated on the periphery of the conductor.

Furthermore, the conductor is formed by stranding multiple strands of category 5 tinned copper wires.

Furthermore, the insulating layer is a silane cross-linked ethylene propylene rubber layer coated on the periphery of the conductor.

Further, the water-blocking layer is a wrapping water-blocking tape.

Furthermore, the buffer layer is a plurality of loose and wound cotton ropes distributed on the inner circumference of the waterproof layer.

Further, the fire-proof layer is formed by compounding a first fire-proof layer and a second fire-proof layer.

Further, the first fireproof layer is an extruded polyurethane sheath.

Further, the second fireproof layer is a wrapping halogen-free low-smoke high-flame-retardant wrapping tape layer.

Further, the outer sheath is a halogen-free low-smoke flame-retardant weather-resistant polyolefin layer coated outside the fireproof layer.

The utility model provides a cable for special type track traffic, it is through setting up the multilayer inoxidizing coating, can make cable wholeness ability high, and applicable in the track traffic who is in different topography, has improved the suitability of cable greatly.

Drawings

The invention is further described with reference to the following drawings and detailed description.

Fig. 1 is a schematic overall structure diagram of the cable for special track traffic.

The following are labeled descriptions of the components in the drawings:

1. the cable comprises a conductor 2, an insulating layer 3, a buffer layer 4, a waterproof layer 5, a first fireproof layer 6, a second fireproof layer 7 and an outer sheath.

Detailed Description

In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further explained by combining with the specific figure below.

Aiming at the technical problem that the existing cable for special rail transit is not high in applicability, based on the technical problem, the scheme provides the cable for special rail transit, the cable is high in overall performance due to the fact that the multilayer protective layers are arranged, and the cable is suitable for rail transit in different terrains, and the applicability of the cable is greatly improved.

Referring to fig. 1, the cable for special track traffic provided by the scheme comprises a cable core, a protective layer, a fireproof layer and an outer sheath; wherein, the periphery of the cable core is sequentially coated with a protective layer, a fireproof layer and an outer sheath.

Further, the cable core comprises a conductor 1 and an insulation layer 2.

The conductor 1 is used for conducting current of the cable, the conductor 1 is preferably formed by twisting multiple strands of 5 th-class tinned copper wires, the bending performance of the twisted conductor is improved, and the tensile resistance is enhanced; the tinning of the copper wire can prevent oxidation and corrosion and prolong the service life.

The insulating layer 2 is coated on the periphery of the conductor 1, and the insulating layer 2 is preferably formed by a silane cross-linked ethylene propylene rubber layer.

The insulation structure does not need rubber processing equipment, can be directly extruded and processed by a plastic extruding machine, and has simple equipment requirement and strong universality; the strength and the electrical property are the same as those of crosslinked polyethylene XLPE and are far higher than those of common rubber; the rubber has high tear resistance, long service life, good softness and the characteristics of rubber; warm water crosslinking, normal temperature self-crosslinking, simple crosslinking mode; no vulcanization and light specific gravity.

The protective layer is coated on the periphery of the insulating layer 2 and is formed by mutually matching a buffer layer 3 and a water-resistant layer 4.

The water-blocking layer 4 is preferably formed by wrapping a water-blocking tape, and the water-blocking tape can absorb water and rapidly expand to form gel with a certain height and high strength after meeting the water so as to realize water blocking

The buffer layer 3 is preferably a plurality of sparse winding cotton ropes which are uniformly distributed on the circumference of the inner part of the waterproof layer 4, and the cotton ropes are light and soft, have a heat insulation effect at high temperature and have a heat preservation effect at low temperature; moisture absorption, air permeability, certain tensile strength, compression resistance and impact resistance.

The protection layer formed by the buffer layer 3 and the water blocking layer 4 in a mutually matched mode can effectively protect the cable core.

The fireproof layer covers the periphery of the protective layer and comprises a first fireproof layer 5 and a second fireproof layer 6.

Wherein, first flame retardant coating 5 and second flame retardant coating 6 are preferably crowded package polyurethane sheath respectively and are formed with the compounding around package halogen-free low smoke high fire-retardant band layer.

Wherein, the polyurethane sheath extruded has higher oxidation stability and weather resistance; flexibility, resilience; excellent solvent resistance, fire resistance and low temperature resistance; has a certain degaussing function and reduces interference.

The halogen-free low-smoke high-flame-retardant wrapping tape layer has excellent flame retardance, corrosion resistance and environmental protection.

The cable core can be effectively protected and prevented from fire by the fireproof layer formed by extruding the polyurethane sheath and wrapping the halogen-free low-smoke high-flame-retardant wrapping tape layer.

The outer sheath 7 is coated outside the fireproof layer and arranged on the periphery of the whole cable core.

The outer sheath 7 is preferably made of a halogen-free low-smoke flame-retardant weather-resistant polyolefin layer at the temperature of-52 ℃, has excellent low-temperature resistance and impact embrittlement resistance, and does not crack even being bent for many times at a small bending radius in a low-temperature environment; it also has flame retardant, no halogen, low smoke and low toxicity; excellent weather resistance, aging resistance and wear resistance.

The special track traffic cable formed by the scheme has a simple structure and is convenient to use.

Meanwhile, the multilayer protective layers are arranged, so that the overall performance of the cable is high, the cable is suitable for rail transit in different terrains, and the applicability of the cable is greatly improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A cable for special rail transit is characterized by comprising a cable core, a protective layer, a fireproof layer and an outer sheath; the protective layer comprises a buffer layer and a water-resistant layer; the cable core periphery wraps the buffer layer, the water blocking layer, the fireproof layer and the outer sheath in sequence.

2. The special track traffic cable of claim 1, wherein the cable core includes a conductor and an insulating layer; the insulating layer is coated on the periphery of the conductor.

3. A special track traffic cable according to claim 2, wherein said conductor is a stranded type 5 tinned copper wire.

4. A cable for special track traffic as claimed in claim 2, wherein the insulating layer is a layer of silane cross-linked ethylene propylene rubber coated around the conductor.

5. The cable for special track traffic as defined in claim 1, wherein said water-blocking layer is a wrapped water-blocking tape.

6. A cable for special track traffic as claimed in claim 1, wherein said buffer layer is a plurality of loosely wound cotton ropes distributed around the inner circumference of the water-resistant layer.

7. A special track traffic cable according to claim 1, wherein the fire resistant layer is a composite of a first fire resistant layer and a second fire resistant layer.

8. A cable for special track traffic according to claim 7, wherein said first fire resistant layer is an extruded polyurethane sheath.

9. A cable for special track traffic as claimed in claim 7, wherein said second fire-resistant layer is a halogen-free, low smoke, high fire-resistant wrapping tape.

10. A cable for special track traffic as claimed in claim 1, wherein the outer sheath is a halogen-free low-smoke flame-retardant weatherable polyolefin layer coated outside the fire-resistant layer.