CN215988177U - Fireproof cable structure - Google Patents

Abstract

The utility model relates to a fireproof cable structure relates to the field of cable technology, and it includes the cable core, and the cable core is provided with the insulating layer outward, and the insulating layer is provided with the flame retardant coating that uses fire prevention powder to fill the formation outward, and the flame retardant coating is provided with the exterior tegillum outward, is provided with a plurality of inflation piece in the flame retardant coating. This application has the effect that improves flame retardant coating stopping to cable tegillum guard action.

Description

Fireproof cable structure

Technical Field

The application relates to the field of cable technology, especially, relate to a fireproof cable structure.

Background

The wire and cable are wire products for transmitting electric (magnetic) energy, information and realizing electromagnetic energy conversion. With the gradual increase of the use amount of cables in China, cable fire accidents frequently occur in recent years, due to the fact that fire prevention measures are incomplete, the cables spread quickly after being fired, the fire is violent and difficult to extinguish, a large amount of cables and equipment are directly burnt, the time for power failure restoration is long, industrial and agricultural production and electricity utilization of people in life are seriously affected, and huge losses are caused.

At present, the cable fire prevention is mainly through setting up the flame retardant coating in cable inside, and the intussuseption of flame retardant coating packs non-combustible material, and when the tegillum was burnt out outside the cable, the flame retardant coating can effectively prevent the intensity of a fire to stretch to cable core department, causes the cable core short circuit, takes place bigger incident.

Aiming at the related technologies, the inventor only can prevent fire from entering a cable core through the fireproof layer of the cable at present, the fireproof layer cannot play a role or plays a small role in protection when the outer layer of the cable is burnt, and the outer layer is made of PVC materials, so that the outer layer of the cable with serious fire can still spread all around to cause larger accidents, and the current cable has the defect of poor safety.

SUMMERY OF THE UTILITY MODEL

In order to improve the guard action of flame retardant coating stopping to cable tegument, this application provides a fireproof cable structure.

The application provides a fireproof cable structure adopts following technical scheme:

the utility model provides a fireproof cable structure, includes the cable core, the cable core is provided with the insulating layer outward, the insulating layer is provided with the flame retardant coating that uses fire prevention powder to fill the formation outward, the flame retardant coating is provided with outer tegillum outward, be provided with a plurality of inflation piece in the flame retardant coating.

Through adopting above-mentioned technical scheme, when the outer tegument of cable is burnt, outer tegument production is broken, and fire prevention powder in the fire prevention layer contacts with the air, and the inflation piece in the fire prevention powder produces the inflation under losing outer tegument pressure effect, makes fire prevention powder spray outside outer tegument to the fire of outer tegument department carries out the scope nature and puts out, thereby is favorable to the intensity of a fire can't rely on outer tegument to spread, thereby security when improving the cable and using.

Optionally, a cavity for filling compressed inert gas is arranged in the expansion piece.

Through adopting above-mentioned technical scheme, under the effect that the piece that expands loses outer quilt layer pressure restriction, the rapid inflation of the compressed inert gas in the piece that expands explodes, when extrudeing the fire prevention powder outside outer quilt layer, the compressed inert gas that the diffusion and go out further improves fire prevention effect.

Optionally, a plurality of partition members are arranged between the insulating layer and the exterior layer, a cavity is formed between each two adjacent partition members and the insulating layer and between the adjacent two adjacent exterior layers, and the fireproof layer is arranged in the cavity in multiple sections.

Through adopting above-mentioned technical scheme, the fire barrier is cut apart into a plurality of little cavities with the flame retardant coating, when the cable only had a department ignition point, only can make the inflation piece in the cavity nearby this department produce the inflation, can not influence the use of inflation piece in the cavity of other departments to be favorable to continuing to maintain the fire behavior of other departments of cable.

Optionally, all of the spacers are provided as resilient compression members.

Through adopting above-mentioned technical scheme, when the cable is intact, the elasticity compressive property of cavity four walls is favorable to guaranteeing the bendability of cable state.

Optionally, a buffer hole is arranged in the partition member.

By adopting the technical scheme, the buffer hole can further improve the elasticity margin of the partition piece, so that the protection effect of the partition piece on the cable is further improved.

Optionally, the expansion member is located on an inner side wall of the chamber adjacent to the cable core.

Through adopting above-mentioned technical scheme, the inflation piece is located the most inboard to be favorable to fully extruding the fire prevention dust in the outside to outside the quilt layer.

Optionally, the spacers are equally spaced around the centre of the cable.

Through adopting above-mentioned technical scheme, the cavity of even setting is favorable to guaranteeing that the fire prevention protection that the interior fire prevention powder of cavity received the cable is comparatively even, further improves the stability of cable fire behavior.

Optionally, the inner side wall around the chamber is provided with a prompt layer.

Through adopting above-mentioned technical scheme, so that the fire prevention powder discharges the back at outer tegument quilt destruction, suggestion layer easy access personnel discover the impaired department of cable and follow and trade.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the outer tegument of the cable is burnt, the outer tegument is broken, the fireproof powder in the outer tegument is contacted with the air, the expansion piece in the fireproof powder expands under the action of losing the pressure of the outer tegument, and the fireproof powder is sprayed out of the outer tegument, so that the fire at the outer tegument is extinguished, the fire can not spread by the outer tegument, and the safety of the cable in use is improved;

2. under the action that the pressure of the outer coating of the expansion piece is not limited, the compressed inert gas in the expansion piece is rapidly expanded and exploded, the fireproof powder is extruded to the outside of the outer coating, and the diffused compressed inert gas further improves the fireproof effect;

3. the fire-proof layer is divided into a plurality of small chambers, when the cable has only one ignition point, the expansion piece in the chamber nearby the ignition point can be expanded, the use of the expansion piece in the chambers at other positions can not be influenced, and the fire-proof performance of the cable at other positions can be continuously maintained.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present application.

Description of reference numerals: 1. a cable core; 2. an insulating layer; 3. a fire barrier layer; 4. a tegument layer; 5. an expansion member; 6. a cavity; 7. a chamber; 8. a spacer; 9. a prompt layer; 10. and a buffer hole.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

The embodiment of the application discloses a fireproof cable. Referring to fig. 1, a fireproof cable includes a cable core 1, the cable core 1 is composed of one or more mutually insulated wires. The cable core 1 is provided with round insulating layer 2 outward, and insulating layer 2 can select for use to be the polyolefin bed of material, and insulating layer 2 is provided with flame retardant coating 3 outward, and flame retardant coating 3 is filled by fire prevention powder and forms, and fire prevention powder can select for use to be inorganic fire prevention powder, and fire prevention powder plays fire protection's effect to cable core 1.

Around 2 week side walls of 1 outer insulating layer of cable core rotation evenly be provided with a plurality of disconnected pieces 8 in flame retardant coating 3, separate the elastic compression piece that disconnected piece 8 was made for by alloy spring steel wire, separate 8 central points of disconnected piece and put the department and seted up buffer hole 10, thereby play certain resilient support's effect to cable core 1, adjacent disconnected piece 8 and cable outer tegillum 4 and insulating layer 2 form a plurality of cavity 7, the opening of cavity 7 is the setting of expanding outward, thereby further be favorable to outside the fire prevention dust complete extrusion in cavity 7 of expansion piece 5 when outer tegillum 4 burns out to the cable.

The cavity 7 keep away from outer tegument 4 inside wall and be provided with inflation piece 5, inflation piece 5 can be selected for use and is glued the ball for the inflation, is provided with cavity 6 in the inflation piece 5, and cavity 6 intussuseption is filled with compressed nitrogen gas, and under the intact state of cable outer tegument 4, inflation piece 5 remains the compression state under outer tegument 4 pressure effect all the time. When the outer layer 4 is burnt through by fire, the compressed nitrogen in the cavity 6 of the expansion piece 5 immediately loses the control of the external pressure, rapidly expands and bursts the expansion piece 5, and the burst does not cause any safety problem because the expansion piece 5 has a relatively small volume, and in the process of expanding and exploding the expansion piece 5, the fireproof powder in the cavity 7 of the expansion piece 5 is extruded and sprayed out from the damaged part to achieve a certain fire extinguishing effect. Meanwhile, after explosion, compressed nitrogen is gushed out from the cable, so that the surrounding air is in a transient anaerobic state, the extinguishing of a fire source at the cable is further facilitated, and the effect of preventing the outer layer 4 of the cable from fire is achieved.

The lateral wall is provided with suggestion layer 9 around the cavity 7, and suggestion layer 9 can choose for use to be red brush paint layer, and the quilt 4 produces outside the cable and damages, and the fire prevention dust of the intussuseption of cable cavity 7 is extruded cavity 7 by inflation piece 5 to make cavity 7 lateral wall expose in the air, the comparatively bright-colored suggestion layer 9 of colour easy access personnel discover the impaired department of cable and follow and trade.

The implementation principle of a fireproof cable structure in the embodiment of the application is as follows: when the cable tegument 4 is burnt out, tegument 4 is produced and is broken, fire prevention powder and air contact in the tegument 4 in the cavity 7, inflation piece 5 in the cavity 7 produces the inflation rapidly under losing tegument 4 pressure effect, spout fire prevention powder outside tegument 4, thereby fire to tegument 4 department is put out, the explosion takes place under the effect of the continuous inflation of compression nitrogen gas of inflation piece 5 in the inner chamber simultaneously, make the air near the burning things which may cause a fire source covered by the nitrogen gas that expands out, form the anaerobic environment of a slice region, thereby be favorable to the intensity of a fire to rely on tegument 4 to spread, and then security when improving the cable and using.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A fireproof cable structure which characterized in that: including cable core (1), be provided with insulating layer (2) outside cable core (1), insulating layer (2) are provided with outward and use fire prevention powder to fill flame retardant coating (3) that form, flame retardant coating (3) are provided with outward tegument (4) outward, be provided with a plurality of inflation piece (5) in flame retardant coating (3).

2. A fire-resistant cable construction as claimed in claim 1, wherein: a cavity (6) for filling compressed inert gas is arranged in the expansion piece (5).

3. A fire-resistant cable construction as claimed in claim 1, wherein: a plurality of partition parts (8) are arranged between the insulating layer (2) and the outer layer (4), a cavity (7) is formed between each two adjacent partition parts (8) and the insulating layer (2) and the outer layer (4), and the fireproof layer (3) is arranged in the cavity (7) in multiple sections.

4. A fire-resistant cable construction as claimed in claim 3, wherein: the partition (8) is configured as a resilient compression element.

5. A fire-resistant cable construction as claimed in claim 3, wherein: and a buffer hole (10) is arranged in the partition part (8).

6. A fire-resistant cable construction as claimed in claim 3, wherein: the expansion piece (5) is positioned on an inner side wall of the chamber (7) close to the cable core (1).

7. A fire-resistant cable construction as claimed in claim 3, wherein: the partition pieces (8) are arranged around the cable core (1) at equal intervals.

8. A fire-resistant cable construction as claimed in claim 3, wherein: and prompt layers (9) are arranged on the inner side walls of the periphery of the cavity (7).

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