CN217035168U

CN217035168U - Fire-resistant cable

Info

Publication number: CN217035168U
Application number: CN202122788739.1U
Authority: CN
Inventors: 彭玉忠
Original assignee: Kunming Kunming Railway Cable Co ltd
Current assignee: Kunming Kunming Railway Cable Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-07-22
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a fire-resistant cable which comprises an inner sheath layer and a filler, wherein the filler is fixedly connected to the inner part of the inner sheath layer, and an insulating device is arranged inside the filler. This fire resisting cable, through the hose, the cable core, the first insulation layer, mutually support between first flame retardant coating and the second insulating layer isotructure, can make the insulating effect of cable core better through first insulating layer and second insulating layer, can improve the fire resistance of cable core department through first flame retardant coating simultaneously, through the second flame retardant coating, the cavity, mutually support between oversheath layer and the lug isotructure, can improve the fire-resistant effect in this device outside through second flame retardant coating cooperation cavity, can increase the frictional force between oversheath layer and the ground through the lug simultaneously, make this device more stable.

Description

Fire-resistant cable

Technical Field

The utility model relates to the technical field of cables, in particular to a fire-resistant cable.

Background

Cables are generally formed by twisting several or several groups of conductors (at least two in each group), like ropes, each group of conductors being insulated from each other and often twisted around a center, and being covered with a highly insulating covering layer over the entire outside, some cables having internal energization, external insulation and fire-resistant features, such as a fire-resistant cable of patent No. CN 201698802U, the inner layer of the insulated core being a soft copper conductor and the outer layer being a silicone rubber insulating layer extruded over the soft copper conductor; the fire-resistant sheath is made of 90 ℃ high-flame-retardant low-smoke halogen-free polyolefin material, although the cable in the prior art can complete the function of power transmission, the stability of a cable core is low, the overall fire resistance is not good, and the using effect is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fire-resistant cable to solve the problem that although the cable in the prior art can complete the function of power transmission, the stability of a cable core is low.

In order to achieve the purpose, the utility model provides the following technical scheme: a fire-resistant cable comprises an inner sheath layer and a filler, wherein the filler is fixedly connected to the inner part of the inner sheath layer, and an insulating device is arranged inside the filler;

the insulation device comprises a hose, a cable core, a first insulation layer, a first fireproof layer and a second insulation layer;

the outer wall of hose links to each other with the filler is fixed, the outside of hose is equipped with a plurality of cable core, cable core's outer wall rigid coupling has the first insulation layer, the outer wall rigid coupling on first insulation layer has first flame retardant coating, the outer wall rigid coupling of first flame retardant coating has the second insulating layer, the outer wall of second insulating layer links to each other with hose and filler are fixed respectively.

Preferably, a plurality of the cable cores are distributed in an arc shape by taking the middle point of the hose as a center, so that the cable cores can be more stable.

Preferably, the first insulating layer and the second insulating layer are made of the same material, so that the insulating effect on the cable core can be improved.

Preferably, a refractory device is arranged inside the inner sheath layer;

the fire-resistant device comprises a first baffle, an arc-shaped plate, a protective layer and a second baffle;

it is a plurality of the outside of first baffle links to each other with the inner wall of inner sheath layer is fixed, the inboard rigid coupling of first baffle has the arc, the inboard of arc links to each other with the outer wall of second insulating layer is fixed, the outside of first baffle is equipped with the inoxidizing coating, the inner wall of inoxidizing coating links to each other with the outer wall of inner sheath layer is fixed, the outer wall rigid coupling of inoxidizing coating has a plurality of second baffles.

Preferably, the radian of the arc-shaped plate is consistent with that of the outer wall of the second insulating layer, so that the second insulating layer can be limited.

Preferably, the distance between a plurality of the second baffles is the same, and the arc-shaped plate can be fixed by the second baffles.

Preferably, a protection device is installed on the outer side of the second baffle;

the protection device comprises a second fireproof layer, a cavity, an outer sheath layer and a bump;

the inner wall of the second fireproof layer is fixedly connected with the second baffle, a cavity is processed inside the second fireproof layer, an outer wall of the second fireproof layer is fixedly connected with an outer sheath layer, and a plurality of convex blocks are processed on the outer wall of the outer sheath layer.

Preferably, the outer sheath layer has a thickness greater than that of the second fire-resistant layer, so that the fire-resistance of the outer side of the device can be improved by the second fire-resistant layer.

Compared with the prior art, the utility model has the beneficial effects that: according to the fire-resistant cable, through mutual matching of the structures such as the hose, the cable core, the first insulating layer, the first fire-resistant layer and the second insulating layer, the insulating effect of the cable core can be better through the first insulating layer and the second insulating layer, and meanwhile, the fire resistance of the cable core can be improved through the first fire-resistant layer;

through the mutual matching of the structures such as the first baffle, the arc-shaped plate, the protective layer and the second baffle, the inner cable core can be supported through the first baffle and the second baffle, so that the cable core is more stable;

through mutually supporting between second flame retardant coating, cavity, oversheath layer and the lug isotructure, can improve the fire-resistant effect in this device outside through second flame retardant coating cooperation cavity, can increase the frictional force between oversheath layer and the ground through the lug simultaneously, make this device more stable.

Drawings

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

FIG. 2 is a schematic view of the structure of FIG. 1 at the cable core, filler and inner jacket layer;

FIG. 3 is a schematic view of the first insulating layer, the second insulating layer and the first barrier of FIG. 1;

fig. 4 is a schematic structural view of the bump, the second barrier and the outer sheath layer in fig. 1.

In the figure: 1. inner sheath layer, 2, filler, 3, insulating device, 301, hose, 302, cable core, 303, first insulating layer, 304, first flame retardant coating, 305, second insulating layer, 4, refractory device, 401, first baffle, 402, arc, 403, the inoxidizing coating, 404, second baffle, 5, protection device, 501, second flame retardant coating, 502, the cavity, 503, the outer sheath layer, 504, the lug.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a fire-resistant cable comprises an inner sheath layer 1 and a filler 2, wherein the inner sheath layer 1 is made of high-temperature fluoroplastic and has good high-temperature resistance, the filler 2 is fixedly connected to the inner sheath layer 1, the filler 2 is made of high-temperature glass fiber, an insulating device 3 is arranged inside the filler 2, the insulating device 3 comprises a hose 301, cable cores 302, a first insulating layer 303, a first fireproof layer 304 and a second insulating layer 305, the outer wall of the hose 301 is fixedly connected with the filler 2, 4 cable cores 302 are arranged on the outer side of the hose 301, the cable cores 302 can be limited through the hose 301, the outer wall of the cable cores 302 is fixedly connected with the first insulating layer 303, the first fireproof layer 304 is fixedly connected to the outer wall of the first insulating layer 303, mica particles are filled inside the first fireproof layer 304, the mica has good high-temperature resistance and can effectively bear heat emitted by the cable cores 302, thereby play the purpose of fire prevention, the outer wall rigid coupling of first flame retardant coating 304 has second insulating layer 305, and the material of first insulating layer 303 and second insulating layer 305 is crosslinked polyethylene, can play insulating effect to cable core 302, and the outer wall of second insulating layer 305 is fixed with hose 301 and filler 2 respectively and is connected to each other, and 4 cable core 302 use the mid point of hose 301 to be the arc distribution as the center, and first insulating layer 303 is the same with the material of second insulating layer 305.

The internally mounted of inner sheath layer 1 has refractory apparatus 4, refractory apparatus 4 includes first baffle 401, arc 402, inoxidizing coating 403 and second baffle 404, the outside of 4 first baffles 401 links to each other with the inner wall of inner sheath layer 1 is fixed, the inboard rigid coupling of first baffle 401 has arc 402, the inboard of arc 402 links to each other with the outer wall of second insulating layer 305 is fixed, can make second insulating layer 305 more stable through arc 402, the outside of first baffle 401 is equipped with inoxidizing coating 403, inoxidizing coating 403 adopts the mixture of epoxy and carbon black piece, certain compressive property can be provided, the inner wall of inoxidizing coating 403 links to each other with the outer wall of inner sheath layer 1 is fixed, the outer wall rigid coupling of inoxidizing coating 403 has 6 second baffles 404, the radian of arc 402 is unanimous with the outer wall department radian of second insulating layer 305, the distance is the same between 6 second baffles 404.

Protection device 5 is installed in the outside of second baffle 404, protection device 5 includes second flame retardant coating 501, cavity 502, oversheath layer 503 and lug 504, the inner wall and the second baffle 404 of second flame retardant coating 501 are fixed and link to each other, second flame retardant coating 501 is the same with the material of first flame retardant coating 304, can improve the fire prevention effect in this device outside through second flame retardant coating 501, the inside processing of second flame retardant coating 501 has cavity 502, the outer wall rigid coupling of second flame retardant coating 501 has oversheath layer 503, the material of outer lag 503 is the same with the material of interior lag 1, the outer wall processing of oversheath layer 503 has a plurality of lugs 504, can increase frictional force through lug 504, make this device more stable, the thickness of oversheath layer 503 is greater than the thickness of second flame retardant coating 501.

When an operator needs to use a fire-resistant cable, firstly, the operator processes a first insulating layer 303 and a second insulating layer 305 on the outer wall of a cable core 302, the first insulating layer 303 and the second insulating layer 305 are both made of cross-linked polyethylene and can play an insulating role on the cable core 302, a first fireproof layer 304 is processed between the first insulating layer 303 and the second insulating layer 305, mica particles are filled in the first fireproof layer 304, the mica has good high-temperature resistance and can effectively bear heat emitted by the cable core 302, so that the fire-resistant purpose is achieved, a filler 2 and a protective layer 403 are respectively processed in the inner part and the outer part of an inner sheath layer 1, a cavity 502 is arranged on the outer side of the protective layer 403, the protective layer 403 is made of a mixture of epoxy resin and carbon black blocks and can provide certain pressure resistance, the filler 2 is made of high-temperature glass fiber, thus, the cavity 502 is matched to improve the fireproof performance of the outer side of the device, and the cable is more fireproof integrally.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, for example, as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fire-resistant cable, includes inner sheath layer (1) and filler (2), the inside rigid coupling of inner sheath layer (1) has filler (2), its characterized in that: an insulating device (3) is arranged in the filler (2);

the insulation device (3) comprises a hose (301), a cable core (302), a first insulation layer (303), a first fireproof layer (304) and a second insulation layer (305);

the outer wall of hose (301) is fixed continuous with filler (2), the outside of hose (301) is equipped with a plurality of cable core (302), the outer wall rigid coupling of cable core (302) has first insulating layer (303), the outer wall rigid coupling of first insulating layer (303) has first flame retardant coating (304), the outer wall rigid coupling of first flame retardant coating (304) has second insulating layer (305), the outer wall of second insulating layer (305) links to each other with hose (301) and filler (2) are fixed respectively.

2. The fire resistant cable of claim 1, wherein: the cable cores (302) are distributed in an arc shape by taking the middle point of the hose (301) as the center.

3. The fire resistant cable of claim 1, wherein: the first insulating layer (303) and the second insulating layer (305) are made of the same material.

4. The fire resistant cable of claim 1, wherein: a refractory device (4) is arranged in the inner sheath layer (1);

the refractory device (4) comprises a first baffle plate (401), an arc-shaped plate (402), a protective layer (403) and a second baffle plate (404);

it is a plurality of the outside of first baffle (401) links to each other with the inner wall of inner sheath layer (1) is fixed, the inboard rigid coupling of first baffle (401) has arc (402), the inboard of arc (402) links to each other with the outer wall of second insulating layer (305) is fixed, the outside of first baffle (401) is equipped with inoxidizing coating (403), the inner wall of inoxidizing coating (403) links to each other with the outer wall of inner sheath layer (1) is fixed, the outer wall rigid coupling of inoxidizing coating (403) has a plurality of second baffles (404).

5. The fire resistant cable of claim 4, wherein: the radian of the arc-shaped plate (402) is consistent with that of the outer wall of the second insulating layer (305).

6. The fire resistant cable of claim 4, wherein: the distances among the second baffles (404) are the same.

7. The fire resistant cable of claim 4, wherein: a protection device (5) is arranged on the outer side of the second baffle (404);

the protection device (5) comprises a second fireproof layer (501), a cavity (502), an outer sheath layer (503) and a bump (504);

the inner wall and the second baffle (404) of second flame retardant coating (501) are fixed continuous, the inside processing of second flame retardant coating (501) has cavity (502), the outer wall rigid coupling of second flame retardant coating (501) has oversheath layer (503), the outer wall processing of oversheath layer (503) has a plurality of lugs (504).

8. The fire resistant cable of claim 7, wherein: the thickness of the outer sheath layer (503) is larger than that of the second fireproof layer (501).