CN212061982U

CN212061982U - Flame-retardant fireproof cable

Info

Publication number: CN212061982U
Application number: CN202020940582.2U
Authority: CN
Inventors: 何达峰
Original assignee: Hongsheng Wire & Cable Co ltd
Current assignee: Hongsheng Wire & Cable Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-12-01
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a flame-retardant fireproof cable, which comprises a wire main body, wherein a shielding layer, an insulating layer and a protective layer are sequentially arranged outside the wire main body, a ceramic silicon rubber layer is arranged outside the protective layer, an outer sheath is arranged outside the ceramic silicon rubber layer, a cavity is arranged in the outer sheath, and inert gas is filled in the cavity; if the flame breaks through the outer sheath, the inert gas in the cavity is released, and the flame is initially retarded; the ceramic silicon rubber layer has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, the extrusion molding process is simple, residues after combustion are hard ceramic shells, and hard shells are not melted and dropped in a fire environment, so that the ceramic silicon rubber layer plays a firm protection role in ensuring smooth power transmission under the fire condition.

Description

Flame-retardant fireproof cable

Technical Field

The utility model relates to a wire and cable technical field refers in particular to a fire-retardant fireproof cable.

Background

In the modern society, people's life is becoming more and more away from electric energy source, and the cable is the instrument that is used for telecommunication or electric power transmission. The cable is generally composed of a cable core formed by stranding a plurality of conductor cores and a functional protective sleeve wrapped outside the cable core. In a fire, if the cable is burnt, serious safety accidents can be caused. Therefore, it is desirable that the cable have a fire-proof function. At present, the existing cable with the fireproof function mostly depends on the fireproof and flame-retardant performance of the material to realize the fireproof function, and the flame-retardant performance is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fire-retardant fireproof cable has the advantage that improves cable fire behavior.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a flame-retardant fireproof cable comprises a wire main body, wherein a shielding layer, an insulating layer and a protective layer are sequentially arranged on the outer side of the wire main body, a ceramic silicon rubber layer is arranged outside the protective layer, an outer sheath is arranged outside the ceramic silicon rubber layer, a cavity is arranged in the outer sheath, and inert gas is filled in the cavity; if the flame breaks through the outer sheath, the inert gas in the cavity is released, and the flame is initially retarded; the ceramic silicon rubber layer has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, the extrusion molding process is simple, residues after combustion are hard ceramic shells, and hard shells are not melted and dropped in a fire environment, so that the ceramic silicon rubber layer plays a firm protection role in ensuring smooth power transmission under the fire condition.

Preferably, the outer sheath is a polyolefin sheath taking high-density polyethylene and ethylene vinyl acetate copolymer as base materials, the material has less smoke generation amount and generates less or no hydrogen halide gas during combustion, and when the material is applied to a cable sheath, when a cable is on fire, toxic and harmful gas cannot be generated, and the escape personnel cannot be injured.

Preferably, a mica tape is arranged on the inner side of the outer sheath and is attached to the ceramic silicone rubber layer, so that when the conducting wire is short-circuited and ignited, smoke can be guided into the smoke guide pipe, the smoke cannot be diffused, and casualties are avoided.

Preferably, the outer surface of the outer sheath is coated with EVA emulsion which can resist ultraviolet aging, so that the protective sheath is not easy to age and damage in the use process of the color-developing anti-aging cable.

Preferably, a waterproof layer is arranged between the protective layer and the insulating layer, and the waterproof layer is a synthetic polymer waterproof coating film to prevent the short circuit phenomenon caused by the contact of the lead body and external water.

To sum up, the utility model discloses following beneficial effect has:

1. two layers of protection are carried out through the inert gas and the ceramic silicon rubber layer, so that flame is directly blocked, and the fireproof effect is improved;

2. the outer sheath can not generate poisonous and harmful gas during burning, and can not cause injury to the escape personnel

3. The EVA emulsion can be resistant to ultraviolet aging, so that the condition that the protective sleeve is not easy to age or damage in the using process of the color-developing anti-aging cable is ensured, and the service life of the cable is prolonged.

Drawings

Fig. 1 is a first sectional view of the embodiment.

Fig. 2 is a sectional view of the second embodiment.

In the figure, 1, a lead body; 2. a shielding layer; 3. an insulating layer; 4. a protective layer; 5. a silicon rubber layer is ceramic; 6. an outer sheath; 7. an inert gas; 8. mica tapes; 9. EVA emulsion; 10. and a waterproof layer.

Detailed Description

The invention is further described below in terms of specific examples.

As shown in fig. 1 and 2, the flame-retardant fireproof cable comprises a lead main body 1, wherein a shielding layer 2, an insulating layer 3 and a protective layer 4 are sequentially arranged on the outer side of the lead main body 1, a ceramic silicon rubber layer 5 is arranged outside the protective layer 4, an outer sheath 6 is arranged outside the ceramic silicon rubber layer 5, a cavity is arranged in the outer sheath 6, and an inert gas 7 is filled in the cavity; if the flame breaks through the outer sheath 6, the inert gas 7 in the cavity is released, and the flame is initially retarded; the ceramic silicon rubber layer 5 has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, the extrusion molding process is simple, residues after combustion are hard ceramic shells, and hard shells are not melted and dropped in a fire environment, so that the ceramic silicon rubber layer plays a firm protection role in ensuring smooth power transmission under the condition of fire.

The outer sheath 6 is a polyolefin sheath taking high-density polyethylene and ethylene-vinyl acetate copolymer as base materials, the material has less smoke generation amount during combustion, generates less or no hydrogen halide gas, and when the material is applied to a cable sheath, when a cable is on fire, toxic and harmful gas cannot be generated, and the escape personnel cannot be injured.

The mica tape 8 is arranged on the inner side of the outer sheath 6, the mica tape 8 is attached to the ceramic silicone rubber layer 5, and when the conducting wire is short-circuited and is on fire, smoke can be guided into the smoke guide pipe, so that the smoke cannot be diffused to cause casualties.

The outer surface of the outer sheath 6 is coated with EVA emulsion 9, and the EVA emulsion 9 can resist ultraviolet aging, so that the protective sleeve is not easy to age and damage in the use process of the color-developing anti-aging cable.

A waterproof layer 10 is arranged between the protective layer 4 and the insulating layer 3, and the waterproof layer 10 is a synthetic polymer waterproof coating film to prevent the short circuit phenomenon caused by the contact of the lead body 1 and the external water.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A flame-retardant fireproof cable is characterized in that: the wire comprises a wire main body (1), wherein a shielding layer (2), an insulating layer (3) and a protective layer (4) are sequentially arranged on the outer side of the wire main body (1), a ceramic silicon rubber layer (5) is arranged outside the protective layer (4), an outer sheath (6) is arranged outside the ceramic silicon rubber layer (5), a cavity is arranged in the outer sheath (6), and inert gas (7) is filled in the cavity.

2. A fire retardant fireproof cable according to claim 1, wherein: the outer sheath (6) is a polyolefin sheath taking high-density polyethylene and ethylene-vinyl acetate copolymer as base materials.

3. A fire retardant fireproof cable according to claim 1, wherein: a mica tape (8) is arranged on the inner side of the outer sheath (6), and the mica tape (8) is attached to the ceramic silicon rubber layer (5).

4. A fire retardant fireproof cable according to claim 3, wherein: the outer surface of the outer sheath (6) is coated with EVA emulsion (9).

5. A fire retardant fireproof cable according to claim 1, wherein: a waterproof layer (10) is arranged between the protective layer (4) and the insulating layer (3), and the waterproof layer (10) is a synthetic polymer waterproof coating film.