CN218547996U

CN218547996U - Environment-friendly long-life cable for rail transit

Info

Publication number: CN218547996U
Application number: CN202222084906.9U
Authority: CN
Inventors: 王新盛; 李冬梅; 胡凌飞; 卢远航; 苏静祎
Original assignee: Henan Tong Da Cable Co ltd
Current assignee: Henan Tong Da Cable Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2023-02-28
Anticipated expiration: 2032-08-09

Abstract

The utility model discloses an environment-friendly long-life cable for track traffic, set gradually conductive core, inner insulating layer, outer insulating layer, waterproof layer, metal armor and outer jacket from inside to outside, the inner insulating layer sets up to crosslinkable polyethylene layer, the outer insulating layer sets up to crosslinkable halogen-free low smoke flame retardant polyolefin layer, the outer jacket sets up to crosslinkable halogen-free low smoke flame retardant polyolefin layer; the conductive wire core comprises a copper conductor layer I arranged in the center and a plurality of copper conductor layers II tightly wrapping the copper conductor layer I, the cross section of the copper conductor layer I is of a circular structure, the copper conductor layers II are formed by tightly arranging a plurality of copper wires with trapezoidal cross sections, the copper wires of the adjacent copper conductor layers II are arranged in a staggered mode, and the corners of the trapezoidal structure of each copper wire are chamfered with fillets; the utility model discloses increase substantially each item physical and mechanical properties and the electrical property of cable, effectively improved the life of cable.

Description

Environment-friendly long-life cable for rail transit

Technical Field

The utility model relates to a cable specifically relates to an environment-friendly long-life cable for track traffic.

Background

With the rapid development of Chinese economy and the acceleration of urbanization process and the rapid development of urban rail transit construction, the cable is used as an electrician matching product for transmitting electric power and electromagnetic signals and is widely applied to an engineering power transmission and distribution system of rail transit. Because the cable is applied to relatively narrow spaces such as tunnels between subways and subway platforms and the like and is used for traction power supply, illumination, signal control, fire engineering and the like, the cable mostly requires the characteristics of low smoke, no (low) halogen, flame retardance, fire resistance, oil resistance, ultraviolet light resistance, moisture resistance, water resistance and the like, and also has the requirements of rat resistance or termite resistance in some areas.

SUMMERY OF THE UTILITY MODEL

The utility model provides an solve above-mentioned technical problem, provide an environment-friendly long-life cable for track traffic. The cable has the characteristics of flame retardance, fire resistance, moisture resistance, water resistance, rat and ant resistance and the like, and further the service life of the cable is effectively prolonged.

The utility model adopts the technical proposal that: an environment-friendly long-life cable for track traffic is sequentially provided with a conductive wire core, an inner insulating layer, an outer insulating layer, a waterproof layer, a metal armor layer and an outer protective layer from inside to outside, wherein the inner insulating layer is a crosslinkable polyethylene layer, the outer insulating layer is a crosslinkable halogen-free low-smoke flame-retardant polyolefin layer, and the outer protective layer is a crosslinkable halogen-free low-smoke flame-retardant polyolefin layer; the electric conduction sinle silk is including setting up copper conductor layer I at the center and closely cladding multilayer copper conductor layer II outside copper conductor layer I, the cross section of copper conductor layer I is circular structure, copper conductor layer II is closely arranged for trapezoidal copper conductor by many cross sections and forms, and the copper conductor of adjacent copper conductor layer II sets up in the past, and the corner of the trapezium structure of every copper conductor has the fillet of falling.

Preferably, the waterproof layer is an aluminum-plastic composite belt and a flame-retardant polyolefin composite isolation sleeve.

Preferably, the metal armor layer is a non-magnetic metal tape wrapping layer for mechanical protection against rodents.

Preferably, the inner insulating layer, the outer insulating layer and the outer protective layer are subjected to electron radiation crosslinking treatment.

Preferably, the armor is provided as a non-magnetic metal tape wrapping for mechanical protection against rodents and ants.

Preferably, a water-blocking layer is filled between the copper conductor layer I and the copper conductor layer II and between the adjacent copper conductor layers II, and the water-blocking layer is any one of water-blocking powder, water-blocking yarn or water-blocking tape.

The invention has the beneficial effects that:

1. the utility model discloses the insulating layer sets up to double-deck composite construction, and the electric insulating property that the insulating layer emphasizes on insulating in the inner insulation layer, and the flame retardant property that the insulating layer emphasizes on the outer insulation layer, cable insulation layer possesses excellent ageing resistance after irradiation cross-linking modification treatment, can show the life who improves the cable;

2. the conductive wire core comprises a copper conductor layer I arranged at the center and a plurality of copper conductor layers II tightly coated outside the copper conductor layer I, and the conductor layers are the same in material and are arranged tightly;

3. the utility model discloses well conductive core is including the water-blocking layer that sets up, and when moisture infiltrated, the water-blocking layer can expand fast and block the infiltration passageway, and termination water or aqueous vapor further spread and extend to protect the cable effectively, improve the life of cable.

Drawings

FIG. 1 is a schematic view of the present invention;

the labels in the figure are: 1. conductive core, 2, internal insulation layer, 3, external insulation layer, 4, waterproof layer, 5, metal armor, 6, outer jacket, 7, copper conductor layer I, 8, copper conductor layer II.

Detailed Description

The invention is further illustrated by the following specific examples.

Referring to fig. 1, an environment-friendly long-life cable for rail transit is sequentially provided with a conductive wire core 1, an inner insulating layer 2, an outer insulating layer 3, a waterproof layer 4, a metal armor layer 5 and an outer protective layer 6 from inside to outside, wherein the inner insulating layer 2 is a crosslinkable polyethylene layer, the outer insulating layer 3 is a crosslinkable halogen-free low-smoke flame-retardant polyolefin layer, and the outer protective layer is a crosslinkable halogen-free low-smoke flame-retardant polyolefin layer; conductive core 1 is including setting up at the copper conductor layer I7 at the center and inseparable cladding multilayer copper conductor layer II 8 outside copper conductor layer I7, the cross section of copper conductor layer I7 is circular structure, copper conductor layer II 8 is closely arranged for trapezoidal copper wire by many cross sections and constitutes, and adjacent copper conductor layer II 8's copper wire sets up in a staggered way, and every copper wire's the trapezium structure's corner has the fillet, and the radius and the copper wire thickness ratio of fillet are 1:10. the utility model discloses the conductive core is including setting up copper conductor layer I at the center and inseparable cladding multilayer copper conductor layer II outside copper conductor layer I, the conductor material is the same, arrange closely, and copper conductor layer II 8 closely arranges the constitution for trapezoidal copper wire by many cross sections, by the contact of traditional round wire line and line, increase the contact area of face and face, increased the contact area of copper conductor between the layer, guaranteed the structural stability of wire conductive core cross section, the utility model discloses the insulating layer adopts low smoke and zero halogen flame retardant material layer, add inorganic fire retardant in the polyolefin base material, anti-aging agent, emollient etc. through mixing, the plastify, the granulation is made, when the conflagration takes place, can take place the expansion reaction fast, form fine and close porous carbon layer, prevent stretching of flame and the expansion of calamity after the burning, because this kind of material does not contain halogen, run into the conflagration and only produce a small amount of white smog, can not produce poisonous black cigarette, be favorable to evacuation of personnel's life's protection and personnel under the conflagration condition. The sheath chooses for use the cross-linking to have a steamed low fire-retardant polyolefin layer of cigarette, and the setting of this structure makes the utility model discloses the cable fire behaviour is good under the high temperature condition, heat releases for a short time, the smoke volume is few, does not have the drippage, nontoxic environmental protection to guarantee staff's safety when the conflagration, and simple structure, production efficiency is high, environmental protection economy.

Further, the waterproof layer 4 is arranged to be a double-layer composite structure of an aluminum-plastic composite belt and a halogen-free flame-retardant polyolefin isolating sleeve.

Further, the metal armor layer 5 is a non-magnetic metal tape wrapping layer for mechanical rat proofing.

Further, the inner insulating layer 2, the outer insulating layer 3 and the outer protective layer 6 are subjected to electron radiation crosslinking treatment, and after treatment, various physical and mechanical properties and electrical properties of the cable can be greatly improved, and the service life of the cable can be 70 years under normal use conditions. The cable replacement period is greatly prolonged, the comprehensive operation cost of the project can be reduced, and the cable replacement method has good economic and social benefits and is suitable for popularization and application in the rail transit industry.

Further, a water-blocking layer is filled between the copper conductor layer I7 and the copper conductor layer II 8 and between the adjacent copper conductor layers II 8, and the water-blocking layer is any one of water-blocking powder, water-blocking yarn or water-blocking tape. The utility model discloses fill in the clearance between well copper conductor layer I7 and the copper conductor layer II 8 and block water the powder, block water the yarn or block water the arbitrary one of area, play the effect that prevents steam and vertically get into the cable along the conductor.

Claims

1. The utility model provides a track is environment-friendly long-life cable for traffic which characterized in that: the cable is characterized in that the cable is sequentially provided with a conductive wire core (1), an inner insulating layer (2), an outer insulating layer (3), a waterproof layer (4), a metal armor layer (5) and an outer protective layer (6) from inside to outside, wherein the inner insulating layer (2) is a crosslinkable polyethylene layer, the outer insulating layer (3) is a crosslinkable halogen-free low-smoke flame-retardant polyolefin layer, and the outer protective layer is a crosslinkable halogen-free low-smoke flame-retardant polyolefin layer; conductive core (1) is including setting up copper conductor layer I (7) at the center and inseparable cladding multilayer copper conductor layer II (8) outside copper conductor layer I (7), the cross section of copper conductor layer I (7) is circular structure, copper conductor layer II (8) are closely arranged by many cross sections for trapezoidal copper wire and constitute, and the copper wire of adjacent copper conductor layer II (8) sets up in the past, and the corner of the trapezium structure of every copper wire has the fillet.

2. The environment-friendly long-life cable for rail transit according to claim 1, characterized in that: the waterproof layer (4) is of a double-layer composite structure of an aluminum-plastic composite belt and a flame-retardant polyolefin isolating sleeve.

3. The environment-friendly long-life cable for rail transit according to claim 1, characterized in that: the metal armor layer (5) is a non-magnetic metal tape wrapping layer for mechanical rat prevention.

4. The environment-friendly long-life cable for rail transit according to claim 1, characterized in that: the inner insulating layer (2), the outer insulating layer (3) and the outer protective layer (6) are all subjected to electron radiation crosslinking treatment.

5. The environment-friendly long-life cable for rail transit as claimed in claim 1, wherein: and a water-blocking layer is filled between the copper conductor layer I (7) and the copper conductor layer II (8) and between the adjacent copper conductor layers II (8), and is any one of water-blocking powder, water-blocking yarn or water-blocking tape.