CN212675964U - Flame-retardant shielded cable - Google Patents

Abstract

The utility model discloses a fire-retardant shielded cable, include the winding covering A of being made by fire-retardant polyester area, be provided with the sinle silk body of two sets of parallels in the winding covering A by what fire-retardant polyester area was made, the sinle silk body both sides of two sets of parallels are equipped with fan-shaped support, the sinle silk body includes two piece at least close-coupled settings and longitudinal distribution's sinle silk monomer, the sinle silk monomer includes the conductor and twines at the first flame retardant coating of conductor surface, the crowded package first insulation layer in the outside of first flame retardant coating, the region between the sinle silk monomer and that remove line core and fan-shaped support all fills there is the glass fiber rope, the sinle silk monomer skin is equipped with the winding covering B of being. The flame-retardant shielding cable is independent in structural design, good in extrusion resistance and flame-retardant effect, good in performance stability, high in reliability and suitable for popularization and use.

Description

Flame-retardant shielded cable

Technical Field

The utility model relates to a shielded cable with fire behaviour belongs to cable technical field.

Background

With the development of society and the increasing speed of economic construction, the number of various large-scale industrial facilities, high-rise commercial buildings, underground buildings and residential buildings is gradually increased, the total amount of cables is increased, and the laying density is increased. Electrical fire accidents caused by short circuit, spontaneous combustion and the like due to aging of cables are frequent, the loss is serious day by day, and people have stronger and stronger safety awareness. When a fire disaster occurs, most people are not burned but poisoned or choked by smoke toxic gas when a general high-rise building has a fire disaster, so that the use of a high flame-retardant cable becomes necessary.

At present, the flame-retardant shielding cable is used as a connecting line between various electrical appliances, instruments and automatic devices, is mainly used for controlling, monitoring and protecting circuits and the like, and plays various roles of transmitting control, signals and the like. The control cable plays a very important role for the operation of a safe power supply and production system, the function of which can exceed that of the power cable for the main line. Common flame-retardant control cables in the market generally adopt a flame-retardant sheath layer to achieve a flame-retardant effect, and have potential safety hazards in occasions with higher safety requirements. Therefore, it is necessary to develop a highly flame-retardant shielded control cable.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a flame-retardant shielded cable, which can effectively solve the problems of the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a flame-retardant shielding cable comprises a wrapping layer A made of a flame-retardant polyester tape, wherein two groups of parallel wire core bodies are arranged in the wrapping layer A made of the flame-retardant polyester tape, fan-shaped supports are arranged on two sides of the two groups of parallel wire core bodies, each wire core body comprises at least two wire core monomers which are arranged in a close proximity mode and distributed longitudinally, each wire core monomer comprises a conductor and a first flame retardant coating wound on the outer surface of the conductor, a first insulating layer is extruded on the outer side of the first flame retardant coating, glass fiber ropes are filled between the wire core monomers and in a region except the wire core bodies and the fan-shaped supports, a wrapping layer B made of the flame-retardant polyester tape is arranged on the outer layer of each wire core monomer, and a second insulating layer is arranged on; the outer surface of a wrapping layer A made of a flame-retardant polyester belt is sequentially extruded and wrapped with a shielding layer woven by tinned steel wires, a low-smoke low-halogen polyolefin oxygen-insulating layer, a fine steel wire woven armor layer and an outer sheath from inside to outside.

Further, the conductor is composed of an oxygen-free copper wire.

Further, the outer sheath is made of halogen-free low-smoke flame-retardant polyolefin material.

Further, the first fireproof layer is a ceramic fireproof and fireproof composite belt.

Further, the first insulating layer is made of a flame-retardant cross-linked polyethylene material, and the second insulating layer is made of silica gel.

Further, the sector support is made of hard fire-resistant plastic.

And further, coating a flame-retardant coating layer on the outer sheath.

Further, the flame-retardant coating layer is a water-based fireproof coating.

Compared with the prior art, the utility model discloses following beneficial effect has:

according to the structural design of the cable, the cable basically adopts flame-retardant materials from inside to outside, the fire spreading can be well controlled, the flame-retardant coating is difficult to burn, endothermic reaction is generated when the flame-retardant coating meets fire, an inorganic glaze body is formed when the flame-retardant coating meets fire, air is isolated, and the flame-retardant effect can be better achieved;

secondly, the shielding layer made of the tinned steel wire improves the strength of the cable, avoids the oxidation and corrosion of the conductor and improves the weldability and the reliability;

thirdly, brushing a flame-retardant coating layer outside the armor layer, so that the structural design is novel; the filling layer formed by the glass fiber belt and the glass fiber belt winding cladding layer B both utilize the high temperature resistance of the glass fiber;

the rigidity of the cable is increased through the arrangement of the support, the use strength is guaranteed, the compression-resistant effect is improved, and the service life of the cable is guaranteed;

fifthly, the glass fiber rope has high temperature resistance and high strength, and the oxygen isolation layer made of low-smoke low-halogen polyolefin plastic and the outer sheath of the halogen-free low-smoke flame-retardant polyolefin also have high temperature resistance and flame retardance;

the flame-retardant shielding cable is independent in structural design, good in extrusion resistance and flame-retardant effect, good in performance stability, high in reliability and suitable for popularization and use.

Drawings

Fig. 1 is a schematic structural view of a flame-retardant shielding cable body of the present invention;

fig. 2 is a schematic view of the structure of the core body of the flame-retardant shielding cable of the present invention.

In the figure: 1. a lapping layer A; 2. a wire core body; 3. a wire core monomer; 4. a first insulating layer; 5. a first refractory layer; 6. a fan-shaped bracket; 7. a glass fiber rope; 8. a lapping layer B; 9. a second insulating layer; 10. a shielding layer; 11. a conductor; 12. an oxygen barrier layer; 13. an armor layer; 14. a flame retardant coating layer; 15. an outer sheath.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-2, a flame-retardant shielding cable comprises a wrapping layer a1 made of a flame-retardant polyester tape, two groups of parallel wire cores 2 are arranged in the wrapping layer a1 made of the flame-retardant polyester tape, fan-shaped supports 6 are arranged on two sides of the two groups of parallel wire cores 2, the fan-shaped supports 6 are made of hard fire-resistant plastics, the wire cores 2 comprise two wire core monomers 3 which are arranged closely and longitudinally, the wire core monomers 3 comprise conductors 11 and first fire-resistant layers 5 wound on the outer surfaces of the conductors 11, the first fire-resistant layers 5 are ceramic fire-resistant composite tapes, first insulating layers 4 are extruded on the outer sides of the first fire-resistant layers 5, the first insulating layers 4 are made of flame-retardant cross-linked polyethylene materials, the conductors 16 are made of oxygen-free copper wires, glass fiber ropes 7 are filled between the wire core monomers 3 and in regions except the wire core bodies 2 and the fan-shaped supports 6, a wrapping layer B8 made of the flame-retardant, a second insulating layer 9 is arranged on the outer layer of the wrapping layer B8, and the second insulating layer 9 is made of silica gel; the outer surface of a wrapping layer A1 made of a flame-retardant polyester tape is sequentially extruded from inside to outside with a shielding layer 10 woven by tinned steel wires, a low-smoke low-halogen polyolefin oxygen-insulating layer 12, a fine steel wire woven armor layer 13 and an outer sheath 15, the outer sheath 15 is made of a halogen-free low-smoke flame-retardant polyolefin material, a flame-retardant coating layer 14 is coated on the outer sheath 15, and the flame-retardant coating layer 14 is a water-based fire-retardant coating.

It should be noted that the utility model relates to a flame-retardant shielding cable, the manufacturing process is, draw the copper wire to the required line footpath with the little wire drawing machine of copper, use the wire drawing machine to hank the copper wire bundle into conductor 11 according to the technology, the oblique winding pottery fire prevention fire-resistant composite tape constitutes first flame retardant coating 5 on conductor 11, use the extruding machine that the screw diameter is phi 50 or phi 70 to extrude fire-retardant crosslinked polyethylene on first flame retardant coating 5 and constitute first insulating layer 4, fill glass fiber rope 3 between two sinle silk monomers 3, the outer layer of two sinle silk monomers 3 is around the package and is made by fire-retardant polyester tape B8, the outer layer of package is crowded to have second insulating layer 9 that silica gel constitutes around package B8, then set up two groups of sinle silk 2 vertically parallel adjacent, fan-shaped support 6 is introduced to both sides about two groups of sinle silk 2, the rest part is filled with glass fiber rope 3, the package is around package fire-retardant polyester tape and is made around package A1 around the package outside, then, a shielding layer 10 formed by weaving tinned copper wires through a weaving machine, then, a low-smoke low-halogen polyolefin oxygen-insulating layer 12 is extruded out of a proper plastic extruding machine, a weaving machine is used for producing and weaving a thin steel wire armor layer 13 outside the oxygen-insulating layer 12, a semi-finished product after armor is subjected to a final process through a special plastic extruding machine, a coating brushing device is additionally arranged in front of a machine head of the plastic extruding machine, water-based fireproof coating is brushed, the water-based fireproof coating is CDDT-B type cable fireproof coating, the coating brushing and the extrusion of an outer sheath 15 can be completed in one process, and after the outer sheath 15 is extruded, a cable finished product is.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. A flame retardant shielded cable characterized by: comprises a wrapping layer A (1) made of flame-retardant polyester tapes, two groups of parallel wire core bodies (2) are arranged in the wrapping layer A (1) made of the flame-retardant polyester tapes, fan-shaped brackets (6) are arranged on two sides of the two groups of parallel wire core bodies (2), the wire core body (2) comprises at least two wire core monomers (3) which are arranged closely and distributed longitudinally, the wire core monomer (3) comprises a conductor (11) and a first fire-resistant layer (5) wound on the outer surface of the conductor (11), a first insulating layer (4) is extruded on the outer side of the first fire-resistant layer (5), glass fiber ropes (7) are filled between the wire core monomers (3) and in the areas except the wire core body (2) and the fan-shaped bracket (6), a wrapping layer B (8) made of a flame-retardant polyester tape is arranged on the outer layer of the wire core monomer (3), and a second insulating layer (9) is arranged on the outer layer of the wrapping layer B (8); the outer surface of a wrapping layer A (1) made of a flame-retardant polyester tape is sequentially extruded and wrapped with a shielding layer (10) woven by tinned steel wires, a low-smoke low-halogen polyolefin oxygen-insulating layer (12), a fine steel wire woven armor layer (13) and an outer sheath (15) from inside to outside.

2. A flame retardant shielded cable according to claim 1, wherein: the conductor (11) is made of an oxygen-free copper wire.

3. A flame retardant shielded cable according to claim 1, wherein: the outer sheath (15) is made of halogen-free low-smoke flame-retardant polyolefin material.

4. A flame retardant shielded cable according to claim 1, wherein: the first fireproof layer (5) is a ceramic fireproof and fireproof composite belt.

5. A flame retardant shielded cable according to claim 1, wherein: the first insulating layer (4) is made of a flame-retardant cross-linked polyethylene material, and the second insulating layer (9) is made of silica gel.

6. A flame retardant shielded cable according to claim 1, wherein: the fan-shaped support (6) is made of hard fireproof plastic.

7. A flame retardant shielded cable according to claim 1, wherein: and a flame-retardant coating layer (14) is coated on the outer sheath (15).

8. A flame retardant shielded cable according to claim 7, wherein: the flame-retardant coating layer (14) is a water-based fireproof coating.

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