CN211929118U - Flexible fireproof cable with aluminum sheath - Google Patents

Abstract

The utility model discloses an aluminum sheath flexible fireproof cable, which comprises a plurality of strands and conductors wrapped with an insulating fireproof layer, wherein the strands and the conductors wrapped with the insulating fireproof layer are twisted and form a cable core; the periphery of the fireproof wrapping belt is longitudinally wrapped with an aluminum sheath, the periphery of the aluminum sheath is extruded with a fireproof layer, a fire insulation layer is wrapped around the fireproof layer, and a ring protection sleeve is arranged on the periphery of the fire insulation layer; wherein, the aluminum sheath is an embossed aluminum sheath. The utility model discloses a flexible fireproof cable of aluminium sheath has formed a complete fire prevention protection system through hank and conductor, insulating flame retardant coating, fire-proof material, fire-resistant band, aluminium sheath, flame retardant coating and separate the flame retardant coating jointly, has improved the cable core and has operated the security when the conflagration takes place, and for flexible construction, conveniently lays, and is with low costs.

Description

Flexible fireproof cable with aluminum sheath

Technical Field

The utility model belongs to the cable field especially relates to a flexible fireproof cable of aluminium sheath.

Background

Currently, fires that are initiated for electrical reasons account for a considerable portion of all fires. With the rapid development of society, the power supply safety of important facilities becomes more and more important. Therefore, the fireproof performance of the electric wire and the electric cable is improved, the normal use of important facilities under the condition of fire disaster is ensured, and the time is strived for fire fighting rescue.

There are two main types of fireproof cables in the current market, one is a magnesium oxide insulation rigid fireproof cable and a mica tape insulation corrugated copper sheath flexible fireproof cable. The traditional rigid fireproof cable has excellent electrical performance and has the advantages of fire resistance, high temperature resistance, high mechanical strength and the like. However, the magnesium oxide insulating layer is easy to damp, the structure is hard, the installation and the laying are inconvenient, the continuous production length of the cable is limited due to the restriction of a production process, and the number of intermediate joints is large. Under the high-temperature combustion of the inorganic mineral insulated cable insulating layer, mica with insulating and fireproof functions can fall off in a powdery state, and the two fireproof cable metal layers are both provided with copper sheaths, so that the copper resource in China is deficient at present, the copper price is high, and the fireproof cable cost is overhigh.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flexible fireproof cable of aluminium sheath, it is with low costs to fire behavior is good.

The technical scheme of the utility model as follows:

a flexible fireproof cable with an aluminum sheath comprises a strand and a conductor which are wrapped with an insulating fireproof layer, and a plurality of cable cores which are formed by twisting the strand and the conductor which are wrapped with the insulating fireproof layer, wherein a fireproof wrapping tape is wrapped outside the cable cores, and a fireproof material is filled in a gap between each cable core and the corresponding fireproof wrapping tape; the periphery of the fireproof wrapping belt is longitudinally wrapped with an aluminum sheath, the periphery of the aluminum sheath is extruded with a fireproof layer, a fire insulation layer is wrapped around the fireproof layer, and a ring protection sleeve is arranged on the periphery of the fire insulation layer; wherein, the aluminum sheath is an embossed aluminum sheath.

Preferably, the fire-proof layer is a ceramic polyolefin material.

Preferably, the fire-insulating layer is high silica cloth.

Preferably, the insulating fireproof layer is a composite structure formed by wrapping three layers of mica tapes and one layer of high silica cloth. The mica tape can be a gold mica tape, a synthetic mica tape and a calcined mica tape.

Preferably, the strand and conductor are formed from a strand of annealed copper wire. The annealed copper wire enables the flexible fireproof cable with the aluminum sheath to have better flexibility and to be laid more conveniently.

Preferably, the fireproof material is a glass fiber rope or a rock wool rope.

Preferably, the fire-resistant wrapping tape is a glass fiber tape, a low-smoke halogen-free tape, a mica tape or a high-silica cloth.

Preferably, the ring protective sleeve is a low smoke zero halogen polyolefin material.

The utility model has the advantages that:

the utility model discloses a flexible fireproof cable of aluminium sheath has formed a complete fire prevention protection system through hank and conductor, insulating flame retardant coating, fire-proof material, fire-resistant band, aluminium sheath, flame retardant coating and separate the flame retardant coating jointly, has improved the cable core and has operated the security when the conflagration takes place, and for flexible construction, conveniently lays, and is with low costs.

Drawings

Fig. 1 is the utility model discloses a flexible fireproof cable of aluminium sheath structure sketch map.

In the figure: 1. twisting and conducting; 2. an insulating fire-resistant layer; 3. a fire-resistant material; 4. fire-resistant wrapping tape; 5. an aluminum sheath; 6. a fire barrier layer; 7. a fire barrier layer; 8. a ring protection sleeve.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows the utility model discloses a flexible fireproof cable with aluminum sheath, which comprises a twisted conductor 1 and a twisted insulating fireproof layer 2, and a plurality of cable cores formed by twisting the twisted conductor 1 and the twisted insulating fireproof layer 2, wherein a fireproof wrapping tape 4 is wrapped outside the cable core, and a fireproof material 3 is filled in the gap between the cable core and the fireproof wrapping tape 4; the periphery of the fireproof wrapping tape 4 is longitudinally wrapped with an aluminum sheath 5, the periphery of the aluminum sheath 5 is extruded with a fireproof layer 6, the fireproof layer 6 is wrapped with a fire insulation layer 7 in a surrounding mode, and the periphery of the fire insulation layer 7 is provided with a ring protection sleeve 8; wherein, the aluminum sheath 5 is an embossed aluminum sheath.

The utility model discloses a flexible fireproof cable of aluminium sheath is through using hank and conductor 1 and embossing aluminium sheath 5 for the cable has flexibility, and the installation is laid conveniently. And the aluminum sheath is used for replacing the copper sheath, so that the cost is low.

Additionally, the utility model discloses a flexible fireproof cable of aluminum sheath has crowded package flame retardant coating 6 in aluminum sheath 5's periphery, and flame retardant coating 6 has wrapped around the package again outward and has separated fire layer 7, protects aluminum sheath 5 through flame retardant coating 6 and separate fire layer 7. The melting point of the aluminum sheath 5 is only about 660 ℃, the flame temperature reaches over 900 ℃, and under the condition of no protection of the fire-proof layer 6 and the fire-proof layer 7, the aluminum sheath 5 is directly melted in a fire disaster, so that a cable in the aluminum sheath 5 is damaged. The utility model discloses a flexible fireproof cable of aluminum sheath passes through flame retardant coating 6 and separates the protection of fire bed 7 to aluminum sheath for high temperature resistant more can strive for the time for the safe operation of cable when the conflagration breaing out. In addition, the fireproof material 3 is filled between the fireproof wrapping tape 4 in the aluminum sheath 5 and the cable core, the fireproof wrapping tape 4 is not easily damaged by high temperature when a fire disaster happens, the fireproof material 3 can be firmly fixed on the periphery of the cable core, and thus the fireproof material 3 protects the strand with the insulating fireproof layer 2 and the conductor 1, the running time of the cable in the fire disaster is prolonged to a certain extent, and the safety is improved.

The utility model discloses a flexible fireproof cable of aluminum sheath has formed a complete fire prevention protection system through hank and conductor 1, insulating flame retardant coating 2, fire-proof material 3, fire-resistant band 4, aluminum sheath 5, flame retardant coating 6 and fire barrier 7 jointly, has improved the cable core and has moved the security when the conflagration takes place, and for flexible construction, conveniently lays, and is with low costs.

Preferably, the fire-retardant layer 6 is a ceramicized polyolefin material. The 6 crowded packages of flame retardant coating are in the periphery of aluminium sheath 5, and when adopting ceramic polyolefin material, this flame retardant coating 6 can be converted into hard thermal-insulated ceramic supporter rapidly under high temperature flame, and the support cable prevents inside further deformation, plays fine thermal-insulated effect simultaneously, slows down the further softening of aluminium sheath in high temperature, protects the complete of aluminium sheath.

Preferably, the fire barrier layer 7 is a high silica cloth. The high silica cloth has excellent heat resistance and shock resistance, can be used in an environment of 1000 ℃ for a long time, and has instant heat-resistant temperature of 1400 ℃, so that the fire-proof layer 6 is arranged outside the aluminum sheath 5, the fire-isolating layer 7 of the high silica cloth is arranged outside the fire-proof layer 6, and when a fire disaster occurs, the high temperature of flame can be effectively isolated, the aluminum sheath 5 and the cable core in the aluminum sheath 5 are protected, and the normal operation of the cable in the fire disaster is ensured or the heat-resistant time is prolonged.

Preferably, the insulating and fireproof layer 2 is a composite structure formed by wrapping three layers of mica tapes and one layer of high silica cloth. The mica tape can be a gold mica tape, a synthetic mica tape or a calcined mica tape. The high silica cloth has excellent heat resistance and shock resistance, can be used in an environment of 1000 ℃ for a long time, has an instant heat-resistant temperature of 1400 ℃, and can play a good role in fire resistance. The composite structure formed by wrapping three layers of mica tapes and one layer of high silica cloth is used as an insulating layer, the high silica cloth is wrapped outside the three layers of mica tapes, the mica tapes are protected, the mica tapes are prevented from being heated into powder and falling off, and the cable core is prevented from being overheated and generating short circuit in case of fire.

Preferably, the strand and conductor 1 is formed by a strand of annealed copper wire. Annealing copper line makes the utility model discloses a flexible fireproof cable of aluminum sheath's pliability is better, more conveniently lays.

Preferably, the fireproof material 3 is a glass fiber rope or a rock wool rope. The utility model provides a 3 and the fire-resistant band 4 of fire-proof material can once accomplish at cable core stranding process.

Preferably, the fire-resistant wrapping tape 4 is a glass fiber tape, a low-smoke halogen-free tape, a mica tape or a high silica cloth.

Preferably, the ring protective sheath 8 is a low smoke zero halogen polyolefin material.

The utility model discloses a flexible fireproof cable of aluminium sheath has formed a complete fire prevention protection system through hank and conductor, insulating flame retardant coating, fire-proof material, fire-resistant band, aluminium sheath, flame retardant coating and separate the flame retardant coating jointly, has improved the cable core and has operated the security when the conflagration takes place, and for flexible construction, conveniently lays, and is with low costs. And the flexible cable overcomes the defects that the rigid fireproof cable insulating material is easy to be affected with damp, the production length is short and the like. The utility model discloses all materials all adopt environmental protection material, do not produce the pollution to the environment.

It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other. In addition, the above embodiments are only some embodiments, not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention based on the embodiments of the present invention.

Claims (8)

1. The flexible fireproof cable with the aluminum sheath is characterized by comprising a strand and a conductor which are wound with an insulating fireproof layer, and a plurality of cable cores which are formed by twisting the strand and the conductor which are wound with the insulating fireproof layer, wherein a fireproof wrapping tape is wound outside the cable cores, and a fireproof material is filled in a gap between each cable core and the corresponding fireproof wrapping tape; the periphery of the fireproof wrapping belt is longitudinally wrapped with an aluminum sheath, the periphery of the aluminum sheath is extruded with a fireproof layer, a fire insulation layer is wrapped around the fireproof layer, and a ring protection sleeve is arranged on the periphery of the fire insulation layer; wherein, the aluminum sheath is an embossed aluminum sheath.

2. The aluminum-sheathed flexible fireproof cable of claim 1, wherein the fireproof layer is a ceramicized polyolefin material.

3. The aluminum-sheathed flexible fireproof cable of claim 1, wherein the fire barrier layer is a high silica cloth.

4. The flexible fireproof cable with the aluminum sheath according to claim 1, wherein the insulating and fireproof layer is a composite structure formed by wrapping three layers of mica tapes and one layer of high silica cloth.

5. The aluminum-sheathed flexible fireproof cable of claim 1, wherein the strand and conductor are formed from a strand of annealed copper wire.

6. The aluminum-sheathed flexible fireproof cable of claim 1, wherein the fireproof material is a glass fiber rope or a rock wool rope.

7. The aluminum-sheathed flexible fireproof cable of claim 1, wherein the fire-resistant wrapping tape is a fiberglass tape, a low-smoke halogen-free tape, a mica tape or a high-silica cloth.

8. The aluminum-sheathed flexible fireproof cable of claim 1, wherein the ring-sheath is a low-smoke halogen-free polyolefin material.

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