CN215069380U

CN215069380U - Special high flame-retardant flexible fire-resistant cable for fire alarm system

Info

Publication number: CN215069380U
Application number: CN202120540143.7U
Authority: CN
Inventors: 赵复明; 孙冰
Original assignee: Shanghai Ain Wire And Cable Co ltd
Current assignee: Shanghai Ain Wire And Cable Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-12-07
Anticipated expiration: 2031-03-16

Abstract

The utility model discloses a special high flame-retardant flexible fire-resistant cable for a fire alarm system, which comprises an outer protective layer, wherein a fire-proof layer is arranged on the inner wall of the outer protective layer, a shielding layer is connected on the inner wall of the fire-proof layer, a shock-absorbing interlayer is arranged on the inner wall of the shielding layer, annular elastic rubber is arranged on the inner wall of the shock-absorbing interlayer, the outer diameter of the elastic rubber is the same as the inner diameter of the shock-absorbing interlayer, the utility model can shield external electromagnetic interference at normal temperature by arranging the shielding layer, ensure the reliability of the information of internal cables, prevent the alarm system from being triggered and endanger the safety of people, and through arranging an air bag, when a fire occurs, paraffin is melted, so that a sharp needle is contacted with the air bag, internal carbon dioxide gas overflows, oxygen is isolated, the fire range is prevented from being expanded, and through arranging a dry powder pipe, when the fire occurs, the paraffin pipe is melted, and internal incombustible dust is released, protect the cable, prevent that the cable from catching fire, cause harm.

Description

Special high flame-retardant flexible fire-resistant cable for fire alarm system

Technical Field

The utility model relates to the technical field of cables, specifically be a special high fire-retardant flexible fire resisting cable of fire alarm system.

Background

With the rapid development of social economy in China, important engineering facilities such as subways, airports, railways, tunnels and the like and personnel-intensive occasions such as intelligent districts, large supermarkets, public places and the like are more and more. In order to guarantee the life and property safety of people, fire alarm systems are also widely applied. The fire alarm system can convert the physical quantities such as smoke, heat, flame and the like generated by combustion into electric signals through the fire detector at the initial stage of a fire, transmit the electric signals to the fire alarm controller, inform the evacuation of the whole floor in the form of sound or light, and record the position, time and the like of the fire, so that people can find the fire in time and take effective measures in time.

The cable of the fire alarm system in the prior art is easy to burn out, and the outer layer of part of the fire-resistant cable is provided with a mica tape to form an outer fire-resistant layer, so that the mica tape is easy to fall off to cause the incompleteness of the fire-resistant layer in the processing and production process, and the mica is easy to become brittle after combustion and poor in fire-resistant effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a special high fire-retardant flexible fire resisting cable of fire alarm system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a special high fire-retardant flexible fire-resistant cable of fire alarm system, includes the outer protective layer, install the flame retardant coating on the outer protective layer inner wall, be connected with the shielding layer on the flame retardant coating inner wall, be equipped with shock attenuation intermediate layer on the shielding layer inner wall, be equipped with annular elastic rubber on the shock attenuation intermediate layer inner wall, the elastic rubber external diameter is the same with shock attenuation intermediate layer internal diameter, a plurality of dry powder pipes are installed to the equidistance in the elastic rubber lateral wall, the inside packing of dry powder pipe has incombustible dust, the inside four cables that evenly are equipped with of elastic rubber, the cable outer wall is equipped with the insulating layer, four install the cylindricality gasbag between the cable, the inside packing of gasbag has carbon dioxide gas.

Preferably, the fire-proof layer is an inorganic high-fire-retardant glass fiber tape layer.

Preferably, the shielding layer is a copper tape shielding layer.

Preferably, the dry powder tube is a paraffin wax hollow tube.

Preferably, the inner wall of the elastic rubber is provided with a sharp needle, and the sharp needle is isolated from the air bag through paraffin.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a set up the shielding layer, can shield external electromagnetic interference at normal atmospheric temperature, guarantee the reliability of inside cable information, prevent that alarm system from postponing triggering, harm masses' safety, through setting up the gasbag, when the conflagration takes place, paraffin melts, makes sharp needle contact gasbag, and inside carbon dioxide gas overflows, and isolated oxygen avoids the conflagration scope to enlarge, through setting up the dry powder pipe, when the conflagration takes place, the paraffin pipe melts, and inside incombustible dust releases, protects the cable, prevents that the cable from firing, causes harm.

Drawings

Fig. 1 is a schematic view of the overall structure of a special high-flame-retardant flexible fire-resistant cable for a fire alarm system according to the present invention;

fig. 2 is the utility model provides a special high fire-retardant flexible fire-resistant cable's of fire alarm system elasticity rubber inner wall structure sketch map.

In the figure: the anti-explosion safety protection device comprises an outer protection layer 1, a fire-proof layer 2, a shielding layer 3, a shock absorption interlayer 4, elastic rubber 5, a dry powder pipe 6, an insulation layer 7, an air bag 8, a cable 9 and a sharp needle 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a special high flame-retardant flexible fire-resistant cable for a fire alarm system comprises an outer protective layer 1, a fire-resistant layer 2 is arranged on the inner wall of the outer protective layer 1, a shielding layer 3 is connected on the inner wall of the fire-resistant layer 2, a damping interlayer 4 is arranged on the inner wall of the shielding layer 3, annular elastic rubber 5 is arranged on the inner wall of the damping interlayer 4, the outer diameter of the elastic rubber 5 is the same as the inner diameter of the damping interlayer 4, a plurality of dry powder tubes 6 are equidistantly arranged in the side wall of the elastic rubber 5, non-combustible dust is filled in the dry powder tubes 6, four cables 9 are uniformly arranged in the elastic rubber 5, an insulating layer 7 is arranged on the outer wall of each cable 9, cylindrical air bags 8 are arranged among the four cables 9, carbon dioxide gas is filled in the air bags 8, at normal temperature, the shielding layer 3 can ensure that the cables are not interfered by external electromagnetism, the alarm system can prevent false alarm and cause troubles, when a fire occurs, the fire-resistant layer 2 can protect the inner cables from being affected by the fire, when the flame temperature was too high, dry powder pipe 6 melted, and the incombustible dust of its inside releases, with the slow incombustible dust of the inside packing of elastic rubber 5, prevented that flame from influencing the cable, and simultaneously, the paraffin at point needle 10 top melts, and gasbag 8 is heated the inflation, and with point needle 10 contact, lead to gasbag 8 damaged, and inside carbon dioxide release extrudes the inside oxygen of elastic rubber 5, further isolated flame, protects inside cable, prevents its damage.

Further, the fireproof layer 2 is an inorganic high-flame-retardant glass fiber tape layer.

Further, the shielding layer 3 is a copper tape shielding layer.

Furthermore, the dry powder pipe 6 is a paraffin wax hollow pipe, and the paraffin wax is melted at high temperature, so that the nonflammable powder is conveniently released.

Furthermore, a sharp needle 10 is arranged on the inner wall of the elastic rubber 5, the sharp needle 10 is isolated from the air bag 8 through paraffin, so that the air bag 8 is broken, carbon dioxide is released, the elastic rubber 5 is filled with non-combustible gas, and damage to cables is prevented.

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

Claims

1. The utility model provides a special high fire-retardant flexible fire resisting cable of fire alarm system, includes outer protective layer (1), its characterized in that: install flame retardant coating (2) on outer protective layer (1) inner wall, be connected with shielding layer (3) on flame retardant coating (2) inner wall, be equipped with shock attenuation intermediate layer (4) on shielding layer (3) inner wall, be equipped with annular elastic rubber (5) on shock attenuation intermediate layer (4) inner wall, elastic rubber (5) external diameter is the same with shock attenuation intermediate layer (4) internal diameter, a plurality of dry powder pipes (6) are installed to equidistance in elastic rubber (5) lateral wall, dry powder pipe (6) inside packing has incombustible dust, elastic rubber (5) inside evenly is equipped with four cables (9), cable (9) outer wall is equipped with insulating layer (7), four install cylindricality gasbag (8) between cable (9), gasbag (8) inside packing has carbon dioxide gas.

2. The special high flame-retardant flexible fire-resistant cable for the fire alarm system according to claim 1, wherein: the fireproof layer (2) is an inorganic high-flame-retardant glass fiber tape layer.

3. The special high flame-retardant flexible fire-resistant cable for the fire alarm system according to claim 1, wherein: the shielding layer (3) is a copper strip shielding layer.

4. The special high flame-retardant flexible fire-resistant cable for the fire alarm system according to claim 1, wherein: the dry powder tube (6) is a paraffin wax hollow tube.

5. The special high flame-retardant flexible fire-resistant cable for the fire alarm system according to claim 1, wherein: the inner wall of the elastic rubber (5) is provided with a sharp needle (10), and the sharp needle (10) is isolated from the air bag (8) through paraffin.