CN214203290U

CN214203290U - Cable for high-flame-retardant subway system

Info

Publication number: CN214203290U
Application number: CN202120115974.XU
Authority: CN
Inventors: 常云德; 杨大江; 王娟
Original assignee: Anhui Zongheng Hi Tech Cable Co ltd
Current assignee: Anhui Zongheng Hi Tech Cable Co ltd
Priority date: 2021-01-17
Filing date: 2021-01-17
Publication date: 2021-09-14
Anticipated expiration: 2031-01-17

Abstract

The utility model discloses a high fire-retardant cable for subway system, including oversheath and conductor, the internal surface cladding of oversheath has high fire-retardant layer, and the internal surface cladding on high fire-retardant layer has an outer insulating layer, and the cladding has the filling rope in the outer insulating layer simultaneously, the surface cladding of conductor has the enhancement layer, and the surface cladding of enhancement layer has an inner insulating layer. The cable for the high-flame-retardant subway system is provided with a high-flame-retardant layer, the high-flame-retardant layer comprises an aluminum hydroxide flame retardant layer and an EVA (ethylene vinyl acetate) resin layer, the aluminum hydroxide is one of inorganic flame retardants with large use amount in the world at present, no secondary pollution is caused during combustion, toxic and corrosive gas is not generated during pyrolysis, and the cable absorbs heat and emits water vapor and has flame-retardant self-extinguishing performance. The EVA resin has the advantages of good dispersibility in polyolefin, flame-retardant synergistic effect with other additives, antistatic function of polymer products, flexibility, environmental stress cracking resistance and good weather resistance.

Description

Cable for high-flame-retardant subway system

Technical Field

The utility model relates to the technical field of cables, specifically be a high fire-retardant cable for subway system.

Background

Typically a rope-like cable made up of several or groups of conductors (at least two in each group) twisted together, with the conductors of each group being insulated from one another and often twisted around a center, the entire outer surface being coated with a highly insulating coating. The cable has the characteristics of internal electrification and external insulation. Through mass retrieval, the cable in the prior art is typically found to be CN201120255295.9, and the multi-tube high-shielding physical foaming coaxial cable comprises a plurality of wire cores and an outer sleeve wrapping the plurality of wire cores, wherein the wire cores sequentially comprise an inner conductor, a physical foaming insulating layer, a braided shielding layer and an inner sleeve from inside to outside, and the axes of the plurality of wire cores are parallel to each other; the outer sleeve sequentially comprises a polyester belting, an aluminum foil layer, a magnetic conductive braided shielding layer and an outer sleeve from inside to outside. The utility model discloses a physics foaming has reduced the size of cable, has reduced the cost of cable, has obtained low decay, high transmission speed's excellent performance, has increased the magnetic conduction moreover and has woven the shielding layer, makes the ability of confrontation interference reach the biggest, has improved transmission frequency, has guaranteed the transmission quality of signal.

The existing cable is poor in flame-retardant effect and easy to suffer from external force damage caused by human factors, water easily enters the cable from the damaged part to cause electric property reduction of the cable, and therefore the cable is not convenient to use, and the existing equipment needs to be improved aiming at the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high fire-retardant cable for subway system to solve the cable flame retardant efficiency who provides among the above-mentioned background art poor and the cable receives the external force damage of human factor easily, inside is invaded from the damaged to water just easily, causes the problem of cable electrical property decline.

In order to achieve the above object, the utility model provides a following technical scheme: a cable for a high flame-retardant subway system comprises an outer sheath and a conductor,

the inner surface of the outer sheath is coated with a high flame-retardant layer, the inner surface of the high flame-retardant layer is coated with an outer insulating layer, and meanwhile, the outer insulating layer is coated with a filling rope;

the outer surface of the conductor is coated with a reinforcing layer, and the outer surface of the reinforcing layer is coated with an inner insulating layer.

The outer sheath is made of rubber, the high flame-retardant layer is composed of an aluminum hydroxide flame retardant layer and an EVA resin layer, the outer surface of the EVA resin layer is connected with the inner surface of the outer sheath through the aluminum hydroxide flame retardant layer, the reinforcing layer is composed of a steel wire armor layer and a polystyrene foam buffer layer, the outer surface of the polystyrene foam buffer layer is connected with the inner surface of the inner insulating layer through the steel wire armor layer, and the filling rope is made of flame-retardant polypropylene.

Compared with the prior art, the beneficial effects of the utility model are that: the cable for the high-flame-retardant subway system,

(1) the high flame-retardant layer is arranged and comprises an aluminum hydroxide flame retardant layer and an EVA resin layer, wherein the aluminum hydroxide is one of the inorganic flame retardants with large consumption in the world at present, has the functions of flame retardance, smoke abatement and filling, does not have secondary pollution during combustion, does not generate toxic and corrosive gas during pyrolysis, absorbs heat and releases water vapor, has flame-retardant self-extinguishing performance, has good dispersibility in polyolefin, and is easy to generate flame-retardant synergistic effect with other added substances;

(2) the novel waterproof heat-insulating layer is provided with a reinforcing layer, the reinforcing layer comprises a steel wire armoring layer and a polystyrene foam buffer layer, the inner fiber core of the steel wire armoring layer is protected, the novel waterproof heat-insulating layer has a strong-pressure-resistant and stretch-resistant function and can prevent rats from being bitten by insects and the like, bubbles on the inner wall of styrene foam in the polystyrene foam buffer layer are closed and are not communicated with each other, the water absorption rate is low, the freezing resistance is good, and the novel waterproof heat-insulating layer still has good heat-insulating performance under the water immersion condition.

Drawings

FIG. 1 is a schematic cross-sectional structure of the present invention;

FIG. 2 is a schematic structural view of the high flame retardant layer of the present invention;

fig. 3 is a schematic view of the structure of the reinforcing layer of the present invention.

In the figure: 1. the cable comprises an outer sheath, 2 a high flame-retardant layer, 201 an aluminum hydroxide flame-retardant layer, 202 an EVA resin layer, 3 an outer insulating layer, 4 a filling rope, 5 a conductor, 6 a reinforcing layer, 601 a steel wire armor layer, 602 a polystyrene foam buffer layer, 7 an inner insulating layer.

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. 1-3, the present invention provides a technical solution: a cable for a high flame-retardant subway system comprises an outer sheath 1 and a conductor 5,

the inner surface of the outer sheath 1 is coated with a high flame-retardant layer 2, the inner surface of the high flame-retardant layer 2 is coated with an outer insulating layer 3, and meanwhile, a filling rope 4 is coated in the outer insulating layer 3;

the outer surface of conductor 5, conductor 5 is wrapped with enhancement layer 6, and the outer surface of enhancement layer 6 is wrapped with interior insulating layer 7.

Specifically, oversheath 1 is the rubber material, has effectively played the guard action to the bare conductor.

Specifically, high flame retardant layer 2 comprises aluminium hydroxide flame retardant layer 201 and EVA resin layer 202, and the surface of EVA resin layer 202 passes through aluminium hydroxide flame retardant layer 201 and oversheath 1 internal surface connection, and aluminium hydroxide not only has fire-retardant, the smoke abatement, fills three major functions, secondly can also not produce poisonous and corrosive gas when the pyrolysis, and aluminium hydroxide and EVA resin all have better pliability, can not cause the damage because of artificial reason.

Specifically, the reinforcing layer 6 is composed of a steel wire armor layer 601 and a polystyrene foam buffer layer 602, and the outer surface of the polystyrene foam buffer layer 602 is connected with the inner surface of the inner insulating layer 7 through the steel wire armor layer 601, so that the steel wire armor layer has the functions of resisting high pressure and stretching, and can prevent rats and insects from being bitten.

Specifically, the filling rope 4 is made of flame-retardant polypropylene, and has a good flame-retardant effect.

The working principle is as follows: when the high-flame-retardant cable for the subway system is used, under the action of the outer sheath 1 arranged on the outermost side, short-circuit power failure caused by overlapping of foreign matters is effectively prevented, and the bare conductor is protected, under the action of the high-flame-retardant layer 2 arranged on the inner wall of the outer sheath 1, the cable is enabled to have a flame-retardant function and flexibility, the roundness of the cable is improved through the filling rope 4 in the outer insulating layer 3, the filling rope 4 is made of flame-retardant polypropylene and also has a flame-retardant effect, the fiber core in the reinforcing layer 6 outside the conductor 5 can be protected through the steel wire armor layer 601 in the reinforcing layer 6, the high-pressure and tensile resistance function can be realized, the effects of preventing rats from being bitten by insects and the like are realized, the polystyrene foam buffer layer 602 in the reinforcing layer 6 outside the conductor 5 has good freezing resistance, the good heat-insulating performance under the water immersion condition is guaranteed, and in the use process, the cable has the protection function, so that the plug cable has the characteristics of flame resistance, water resistance, moisture resistance, insect bite resistance and better flexibility, and the content which is not described in detail in the specification belongs to the prior art which is known by a person skilled in the art.

The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.

Although the present invention 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 or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a high fire-retardant cable for subway system, includes oversheath (1) and conductor (5), its characterized in that:

the flame-retardant cable comprises an outer sheath (1), wherein the inner surface of the outer sheath (1) is coated with a high flame-retardant layer (2), the inner surface of the high flame-retardant layer (2) is coated with an outer insulating layer (3), and meanwhile, a filling rope (4) is coated in the outer insulating layer (3);

the outer surface of conductor (5) cladding has enhancement layer (6), and the outer surface cladding of enhancement layer (6) has interior insulating layer (7).

2. The cable for the high flame retardant subway system as claimed in claim 1, wherein: the outer sheath (1) is made of rubber.

3. The cable for the high flame retardant subway system as claimed in claim 1, wherein: the high flame-retardant layer (2) is composed of an aluminum hydroxide flame retardant layer (201) and an EVA resin layer (202), and the outer surface of the EVA resin layer (202) is connected with the inner surface of the outer sheath (1) through the aluminum hydroxide flame retardant layer (201).

4. The cable for the high flame retardant subway system as claimed in claim 1, wherein: the reinforcing layer (6) is composed of a steel wire armor layer (601) and a polystyrene foam buffer layer (602), and the outer surface of the polystyrene foam buffer layer (602) is connected with the inner surface of the inner insulating layer (7) through the steel wire armor layer (601).

5. The cable for the high flame retardant subway system as claimed in claim 1, wherein: the filling rope (4) is made of flame-retardant polypropylene.