CN217822190U

CN217822190U - Fire-retardant waterproof subway cable of 35kV and following copper core

Info

Publication number: CN217822190U
Application number: CN202221847954.2U
Authority: CN
Inventors: 黄美华
Original assignee: CHONGQING KEBAO CABLE CO LTD
Current assignee: CHONGQING KEBAO CABLE CO LTD
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-11-15
Anticipated expiration: 2032-07-18

Abstract

The utility model discloses a 35kV and following fire-retardant waterproof subway cable of copper core, relates to the field, the technical scheme of the utility model includes the copper core, insulating layer, copper wire shielding layer, inner sheath, waterproof layer, heat dissipation layer, isolation flame retardant coating, armor and outer jacket have set gradually outside the copper core; the heat dissipation layer is made of graphite fiber ropes, and the graphite fiber ropes are spirally wound on the inner wall of the isolation fire-resistant layer. The cooperation of heat dissipation layer and isolation flame retardant coating can destroy inside avoiding burning on the one hand, and on the other hand can shift the heat to around, avoids the heat to pile up the rising of time temperature, and flame retardant efficiency is very good to the structure is simpler relatively, the probability that reduction conflagration took place that can be fine.

Description

Fire-retardant waterproof subway cable of 35kV and following copper core

Technical Field

The utility model relates to a fire-retardant waterproof subway cable of 35kV and following copper core mainly relates to the field.

Background

The subway environment is complicated, the cable used by the subway is easily damaged by water, fire, rats and ants, and the existing cable used by the subway is usually provided with a multilayer functional structure outside a conductor in order to prevent the damage, for example, a patent document with the publication number of CN101714417A discloses a direct current cable for the subway, which emphasizes flame retardance at one step and isolates combustion outside, but heat is accumulated at one position for a long time, so that the ignition point is easily reached, and the fire is easily caused for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to above prior art, the utility model provides a fire-retardant waterproof subway cable of 35kV and following copper core, the cooperation of heat dissipation layer and isolation flame retardant coating can destroy inside avoiding burning on the one hand, and on the other hand can avoid the heat to rise to the time temperature to shifting around, and flame retardant efficiency is very good, the probability that the reduction conflagration that can be fine takes place.

In order to achieve the above purpose, the technical scheme of the utility model is that: the copper core is sequentially provided with an insulating layer, a copper wire shielding layer, an inner protection layer, a waterproof layer, a heat dissipation layer, an isolation fireproof layer, an armor layer and an outer protection layer;

the heat dissipation layer is made of graphite fiber ropes, and the graphite fiber ropes are spirally wound on the inner wall of the isolation fire-resistant layer.

The technical principle and the beneficial effects of the utility model are as follows:

this scheme adopts the insulating layer to insulate the copper core, and adopt the copper wire shielding layer can avoid inside and outside electromagnetic interference, set up interior sheath between copper wire shielding layer and waterproof layer, on the one hand can protect the structure of inside, on the other hand can avoid the copper wire shielding layer to destroy to outside waterproof layer friction, the cooperation of heat dissipation layer and isolation flame retardant coating, on the one hand can destroy inside avoiding burning, on the other hand graphite fiber cotton rope, can be with heat to around the transfer, avoid the heat to pile up the rise of the time temperature, flame retardant efficiency is very good, adopt the line rope structure can better confirm its position in the cable, it leads to the heat dissipation layer to pile up in one to avoid the cable bending to crumple, can make its distribution more even.

Preferably, the insulating layer is made of ethylene chlorotrifluoroethylene copolymer and has a thickness of not less than 2mm.

Preferably, the copper wire shielding layer is a tinned copper wire. Has better anti-corrosion effect.

Preferably, the inner protective layer is made of halogen-free low-smoke flame-retardant polyolefin. A large amount of toxic gas can not be generated during combustion, and the environment is protected and the device is durable.

Preferably, the waterproof layer adopts a water-blocking aluminum-plastic composite belt, and the thickness of the waterproof layer is not less than 0.3mm. Moisture and humidity can be prevented from corroding the inside of the cable.

Preferably, the isolation fireproof layer is formed by coating a plurality of mica tape overlapping covers. The cable has the characteristics of good fire resistance, acid and alkali resistance, corona resistance and radiation resistance, and the mica tape has good flexibility and tensile strength and can be well adapted to the bending of the cable.

Preferably, the isolating fire-resistant layer is provided with a spiral groove for embedding the graphite fiber rope. So that more conveniently fix the spiral fibre cotton rope, avoid leading to the outside spiral protruding structure that forms of cable because of the graphite fiber cotton rope, also better make spiral fibre cotton rope evenly distributed simultaneously.

Preferably, the armor layer is an embossed welded copper strip. The cable is provided with mechanical performance, the embossing structure can well play a role in buffering, and the metal welding structure can prevent gnawing damage of rats and ants to the cable.

Preferably, the outer protective layer is made of sunlight-resistant and ultraviolet-resistant low-smoke halogen-free sheath materials, and the thickness of the outer protective layer is not less than 2mm.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only one of the drawings 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 an embodiment of the present invention.

The heat dissipation structure comprises a copper core 1, an insulating layer 2, a copper wire shielding layer 3, an inner protection layer 4, a waterproof layer 5, a heat dissipation layer 6, an isolation fireproof layer 7, an armor layer 8 and an outer protection layer 9.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely preferred embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1, the embodiment of the present invention includes a copper core 1, and an insulating layer 2, a copper wire shielding layer 3, an inner protection layer 4, a waterproof layer 5, a heat dissipation layer 6, an isolation refractory layer 7, an armor layer 8 and an outer protection layer 9 are sequentially disposed outside the copper core 1;

the heat dissipation layer 6 is made of graphite fiber ropes, and the graphite fiber ropes are spirally wound on the inner wall of the isolation fire-resistant layer 7.

this scheme adopts insulating layer 2 can insulate copper core 1, and adopt copper wire shielding layer 3 can avoid inside and outside electromagnetic interference, set up interior sheath 4 between copper wire shielding layer 3 and waterproof layer 5, on the one hand can protect the structure of inside, on the other hand can avoid copper wire shielding layer 3 to destroy to the 5 frictions of outside waterproof layer, heat dissipation layer 6 and the cooperation of keeping apart flame retardant coating 7, on the one hand can destroy inside avoiding burning, on the other hand graphite fiber cotton rope, can shift the heat to around, avoid the heat to pile up the rising of time temperature, flame retardant efficiency is very good, adopt the position of wire rope structure can better confirm its in the cable, avoid the cable bending to rub and roll over and lead to heat dissipation layer 6 to pile up in one, can make its distribution more even.

The insulating layer 2 is made of ethylene chlorotrifluoroethylene copolymer and has the thickness not less than 2mm.

The copper wire shielding layer 3 is made of tinned copper wires. The diameter of the tinned copper wire is not less than 1.6 mm, the total sectional area of the copper wire is not less than 35 square mm, and the tinned copper wire has a better anti-corrosion effect.

The inner protective layer 4 is made of halogen-free low-smoke flame-retardant polyolefin. The thickness is not less than 0.4mm. And a large amount of toxic gas can not be generated during combustion, so that the environment is protected and the use is durable.

The waterproof layer 5 is a water-blocking aluminum-plastic composite tape, and the thickness of the waterproof layer is not less than 0.3mm. Moisture and humidity can be prevented from corroding the inside of the cable.

The isolating fire-resistant layer 7 is formed by covering a plurality of layers of mica tape overlapping covers. The thickness of the mica tape is not less than 0.5mm, the mica tape has the characteristics of good fire resistance, acid and alkali resistance, corona resistance and radiation resistance, and the mica tape has good flexibility and tensile strength and can be well adapted to the bending of the cable.

The isolating fire-resistant layer 7 is provided with a spiral groove in which the graphite fiber ropes are embedded. So that more conveniently fix the spiral fibre cotton rope, avoid leading to the outside spiral protruding structure that forms of cable because of the graphite fiber cotton rope, also better make spiral fibre cotton rope evenly distributed simultaneously.

The armor layer 8 adopts an embossing welding copper strip. The thickness is not less than 0.5mm, the embossing depth is not less than 1.5 mm, and the embossing adopts welding. The cable is provided with mechanical performance, the embossing structure can well play a role in buffering, and the metal welding structure can prevent gnawing damage of rats and ants to the cable.

The outer protective layer 9 is made of sunlight-resistant and ultraviolet-resistant low-smoke halogen-free sheathing material, and the thickness of the sheathing material is not less than 2mm.

The diameter of the graphite fiber rope is 0.3mm smaller.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A35 kV and below copper core (1) flame-retardant waterproof subway cable is characterized by comprising a copper core (1), wherein an insulating layer (2), a copper wire shielding layer (3), an inner protection layer (4), a waterproof layer (5), a heat dissipation layer (6), an isolation flame retardant coating (7), an armor layer (8) and an outer protection layer (9) are sequentially arranged outside the copper core (1);

the heat dissipation layer (6) is made of graphite fiber ropes, and the graphite fiber ropes are spirally wound on the inner wall of the isolation fire-resistant layer (7).

2. The flame-retardant and waterproof subway cable with 35kV and following copper cores (1) according to claim 1, characterized in that: the insulating layer (2) is made of ethylene chlorotrifluoroethylene copolymer and is not less than 2mm thick.

3. The 35kV and following copper core (1) flame-retardant waterproof subway cable of claim 1, characterized in that: the copper wire shielding layer (3) is made of tinned copper wires.

4. The flame-retardant and waterproof subway cable with 35kV and following copper cores (1) according to claim 1, characterized in that: the inner protective layer (4) is made of halogen-free low-smoke flame-retardant polyolefin.

5. The 35kV and following copper core (1) flame-retardant waterproof subway cable of claim 1, characterized in that: the waterproof layer (5) adopts a water-blocking aluminum-plastic composite belt, and the thickness of the waterproof layer is not less than 0.3mm.

6. The flame-retardant and waterproof subway cable with 35kV and following copper cores (1) according to claim 1, characterized in that: the isolating fireproof layer (7) is formed by covering a plurality of layers of mica tape overlapping covers.

7. The flame-retardant and waterproof subway cable with 35kV and following copper cores (1) according to claim 1, characterized in that: the isolating fire-resistant layer (7) is provided with a spiral groove embedded with the graphite fiber rope.

8. The flame-retardant and waterproof subway cable with 35kV and following copper cores (1) according to claim 1, characterized in that: the armor layer (8) adopts an embossing welding copper strip.

9. The flame-retardant and waterproof subway cable with 35kV and following copper cores (1) according to claim 1, characterized in that: the outer protective layer (9) is made of sunlight-resistant and ultraviolet-resistant low-smoke halogen-free sheath material, and the thickness of the sheath material is not less than 2mm.