CN218957440U

CN218957440U - Fireproof cable

Info

Publication number: CN218957440U
Application number: CN202223515983.1U
Authority: CN
Inventors: 贺卫东; 贺旭东; 杨魏伟; 贺高洋
Original assignee: Zhengzhou Special Cable Co ltd
Current assignee: Zhengzhou Special Cable Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-02
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a fireproof cable, which comprises a support frame, a containing cavity and a reinforcing core, wherein the support frame is provided with a cable fixing cavity for fixing a cable core; the accommodating cavity is filled with inert gas, the accommodating cavity is arranged between the cable fixing cavities, and a plurality of barrier films are arranged in the accommodating cavity; the reinforcing core is arranged in the middle of the supporting frame; the cable fixing cavity and the accommodating cavity are arranged in an annular array with the reinforcing core as a center. According to the utility model, the holding cavity for holding the inert gas is formed in the support frame, when the cable is burnt through, the inert gas in the holding cavity can effectively play a good role in preventing fire and retarding the cable from burning, and meanwhile, the holding cavity separates the inert gas through the barrier film to prevent the inert gas from being discharged once, so that the overall fire resistance of the cable is reduced.

Description

Fireproof cable

Technical Field

The utility model relates to the field of cables, in particular to a fireproof cable.

Background

The current cables are made of one or more mutually insulated conductors and an outer insulating protective layer, the wires that transmit power or information from one place to another or cables like ropes, usually stranded from several wires or groups of wires, each group of wires being mutually insulated and often twisted around a center, the whole outer being covered with a highly insulating cover layer. The cable has an inner energized, outer insulated feature.

With the rapid development of the economy in China, various building projects are developed in unprecedented scale and speed, and the higher the building is, the more severe the requirements on electrical equipment are. However, in recent years, fire due to electricity has increased, and fire due to wires and cables therein has been a considerable proportion.

Patent document (CN 214152534U) discloses a fireproof cable, which relates to the field of cable technology, and comprises a cable core, wherein a flame-retardant layer is relatively fixedly arranged on the periphery of the cable core, the flame-retardant layer is in a hollow design, and the inside of the flame-retardant layer is filled with high-pressure inert gas. The application has the effect of better fireproof performance.

The above-mentioned publication also has the following drawbacks by providing the flame retardant layer in a hollow structure, and filling the hollow structure with an inert gas of high pressure, thereby achieving a fire-proof effect:

(1) The arrangement of the structure can only play a role in disposable fire prevention, when the whole circuit burns somewhere, inert gas in the whole circuit is completely discharged from a notch to prevent fire, or the whole cable is damaged somewhere, and the inert gas is discharged from the damaged place, so that the fire resistance of the cable is greatly reduced.

(2) When the cable is overhauled, the cable needs to be cut and broken, and the situation that inert gas is completely released can also occur.

Disclosure of Invention

It is an object of the present utility model to provide a fireproof cable which solves at least any one of the above technical problems.

A further object of the utility model is to avoid that the inert gas is totally released, resulting in a reduction of the overall fire resistance of the cable.

It is a further object of the present utility model to improve the overall fire protection of the cable.

In particular, the present utility model provides a fire-resistant cable comprising: a support frame accommodating the cavity and the reinforcing core, the support frame having a cable fixing cavity fixing the cable core; the accommodating cavity is filled with inert gas, the accommodating cavity is arranged between the cable fixing cavities, and a plurality of barrier films are arranged in the accommodating cavity; the reinforcing core is arranged in the middle of the supporting frame; the cable fixing cavity and the accommodating cavity are arranged in an annular array with the reinforcing core as a center.

Further, a plurality of extending grooves are formed in one surface, far away from the cable core, of the accommodating cavity.

Further, the outside of support frame has set gradually fire-retardant layer, heat-resisting layer and wearing layer from inside to outside.

Further, the barrier films are equidistantly arranged in the accommodating cavity.

Further, the barrier film is made of PVC film materials.

The utility model has the technical effects and advantages that:

according to the utility model, the holding cavity for holding the inert gas is formed in the support frame, when the cable is burnt through, the inert gas in the holding cavity can effectively play a good role in preventing fire and retarding the cable from burning, and meanwhile, the holding cavity separates the inert gas through the barrier film to prevent the inert gas from being discharged once, so that the overall fire resistance of the cable is reduced.

Drawings

Some specific embodiments of the utility model will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic top view of the present utility model.

FIG. 3 is a schematic view of the structure of the utility model in section in the direction B-B in FIG. 2.

FIG. 4 is a schematic view of the cross-sectional structure of FIG. 3 taken along the A-A direction in accordance with the present utility model.

In the figure: 1. the cable comprises a wear-resistant layer, a heat-resistant layer, a flame-retardant layer, a support frame, a 401, a containing cavity, a 402, a cable fixing cavity, a 403, an extension groove, a 404, a barrier film, a 5, a cable core, a 6 and a reinforcing core.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

FIG. 1 is a schematic diagram of the structure of the present utility model. Fig. 2 is a schematic top view of the present utility model. FIG. 3 is a schematic view of the structure of the utility model in section in the direction B-B in FIG. 2. FIG. 4 is a schematic view of the cross-sectional structure of FIG. 3 taken along the A-A direction in accordance with the present utility model.

The scheme of the embodiment provides a fireproof cable, which comprises a support frame 4, a containing cavity 401 and a reinforcing core 6, wherein the support frame 4 is provided with a cable fixing cavity 402 for fixing a cable core 5, the cable core 5 is separated at a corresponding position through the support frame 4, the cable core 5 is prevented from being burnt simultaneously, and a blocking effect is achieved; the accommodating cavity 401 is filled with inert gas, the inert gas can be in a high-pressure state, at the moment of burning through of the accommodating cavity 401, the inert gas is discharged from the burnt-through holes, so that fire is extinguished, the accommodating cavity 401 is arranged between the cable fixing cavities 402, particularly as shown in fig. 1, the number of the cable fixing cavities 402 is three, the number of the accommodating cavities 401 is also three, the reinforcing core 6 is arranged in the middle of the supporting frame 4, and the overall strength and the toughness of a cable wire are reinforced through the arrangement of the reinforcing core 6; the cable fixing cavity 402 with hold the cavity 401 and all use the enhancement core 6 is the central annular array setting, hold the intracavity and be provided with a plurality of barrier film 404, pass through the barrier film 404 will hold the cavity 401 and separate into a plurality of equal inert gas storage chambers of size, when the cable burns, hold the cavity 401 in inert gas can effectually play better fire prevention flame retardant efficiency to cable burning time, hold the cavity 401 and separate inert gas through barrier film 404 simultaneously, prevent that inert gas from once only paying out, thereby cause the reduction of cable overall fire resistance, when the cable is tailor the maintenance simultaneously, also can only separate the inert gas of the part of tailorring and discharge through the diaphragm elsewhere, and do not influence the holistic fire resistance of cable, what needs to be explained here is the inert gas that holds the cavity can also absorb the holistic heat of cable, outside heat, the degree of high temperature resistant improves.

As a preferred embodiment, as shown in fig. 3, a plurality of extending grooves 403 are disposed on a surface of the accommodating cavity 401 away from the cable core 5, at least three extending grooves 403 are disposed, and the extending grooves 403 face the flame retardant layer 3, when the flame retardant layer 3 is broken or burned, the flame burnt first contacts the extending grooves 403 when spreading to the supporting frame 4, the extending grooves 403 are communicated with the accommodating cavity 401, high-pressure inert gas is sprayed out through a notch burned by the extending grooves 403, the burning flame is directly extinguished, the burning area of the supporting frame 4 is prevented from being excessively large, and the extending grooves 403 are used for first contacting and playing a role of pre-spraying.

As a preferred embodiment, the outer part of the supporting frame 4 is provided with a flame retardant layer 3, a heat resistant layer 2 and a wear resistant layer 1 in sequence from inside to outside, and the arrangement of the flame retardant layer 3, the heat resistant layer 2 and the wear resistant layer 1 further enhances the fire resistance, the wear resistance and the high temperature resistance of the cable.

As a preferred embodiment, the barrier films 404 are equidistantly disposed in the accommodating chamber 401, and the accommodating chamber 401 is equally divided by a diaphragm.

As a preferred embodiment, the barrier film 404 is made of PVC or EVOH film or a barrier sheet, and when one of the equal parts of the accommodating chambers 401 continues to burn, the adjacent film or barrier sheet is burned by baking the flame, and the inert gas in the adjacent accommodating chamber 401 is sprayed out to extinguish the fire.

The working principle of the utility model is as follows:

according to the utility model, the accommodating cavity 401 for accommodating the inert gas is formed in the supporting frame 4, when the cable is burnt through, the inert gas in the accommodating cavity 401 can effectively play a good role in preventing fire and retarding the fire of the cable, and meanwhile, the accommodating cavity 401 separates the inert gas through the barrier film 404 to prevent the inert gas from being discharged once, so that the overall fire resistance of the cable is reduced.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A fire-resistant cable comprising:

a support frame (4), the support frame (4) having a cable fixation cavity (402) for fixing a cable core (5);

the cable fixing device comprises a containing cavity (401), wherein inert gas is filled in the containing cavity (401), the containing cavity (401) is arranged between the cable fixing cavities (402), and a plurality of blocking films (404) are arranged in the containing cavity (401);

the reinforcing core (6) is arranged in the middle of the supporting frame (4);

the cable fixing cavity (402) and the accommodating cavity (401) are arranged in an annular array with the reinforcing core (6) as a center.

2. A fire-resistant cable according to claim 1, characterised in that the receiving cavity (401) is provided with a number of extension grooves (403) on the side remote from the cable core (5).

3. A fire-proof cable according to claim 1, characterized in that the outer part of the supporting frame (4) is provided with a flame-retardant layer (3), a heat-resistant layer (2) and a wear-resistant layer (1) in sequence from inside to outside.

4. A fire-resistant cable according to claim 1, characterised in that the barrier films (404) are arranged equidistantly inside the housing cavity (401).

5. A fire-resistant cable according to claim 1, characterised in that the barrier film (404) is a PVC film.