CN224020500U

CN224020500U - A type of fire-resistant and bend-resistant power cable

Info

Publication number: CN224020500U
Application number: CN202520545219.3U
Authority: CN
Inventors: 黎晓东; 吴佩欣; 王剑阳
Original assignee: 3f Electronics Industry Corp ltd
Current assignee: 3f Electronics Industry Corp ltd
Priority date: 2025-03-26
Filing date: 2025-03-26
Publication date: 2026-03-20
Anticipated expiration: 2035-03-26

Abstract

The utility model discloses an anti-bending fire-resistant power cable, relates to the field of power cables, and aims to solve the problems that in the prior art, mica tapes are adopted to wrap as fire-resistant layers, however, the materials are easy to become brittle at high temperature, so that the flexibility of the cable is reduced, and frequent bending is difficult to bear. A plurality of the conductor outsides are provided with fire-resistant insulating layer, fire-resistant insulating layer outside is provided with the tensile layer, the tensile layer outside is provided with the metal shielding layer, the metal shielding layer outside is provided with fire-retardant restrictive coating, fire-retardant restrictive coating outside is provided with the enhancement layer, the enhancement layer outside is provided with the waterproof layer, the waterproof layer outside is provided with the insulating layer, the insulating layer outside is provided with the oversheath layer, adopts ceramic silicone rubber and mica tape composite construction's fire-resistant insulating layer, when guaranteeing cable fire resistance, has improved the pliability of cable, makes it bear frequent buckling.

Description

Bending-resistant fire-resistant power cable

Technical Field

The utility model relates to the field of power cables, in particular to a bending-resistant fire-resistant power cable.

Background

The power cable is a cable for transmitting and distributing electric energy, and is widely applied to the fields of power systems, industrial equipment, building facilities and the like. The power station comprises a conductor, an insulating layer, a shielding layer, a sheath layer and the like, and can safely and efficiently convey electric energy from the power station to a user side. The conductors of the power cable are usually copper or aluminum materials, and have good electrical conductivity.

For example, the authorized bulletin number CN202887856U discloses a tensile fire-resistant power cable, which comprises a plurality of groups of conductors, each group of conductors is externally and sequentially coated with a composite insulating layer and a mica tape, and an insulating wire core is formed, the composite insulating layer is formed by sequentially wrapping a semiconductive nylon tape, a polyvinyl chloride insulating layer and a semiconductive shielding layer from inside to outside, a plurality of insulating wire cores and a reinforced steel core are stranded to form a cable core, the cable core is externally coated with a non-woven fabric wrapping tape, a sheath layer is externally coated on the wrapping tape, and a filling layer is arranged between the cable core and the wrapping tape. The cable has a simple structure, effectively improves the insulation performance of the power cable by adopting the design of the composite insulation layer, effectively improves the tensile capacity of the cable by adopting the design of twisting a plurality of insulation wire cores and the reinforced steel core, effectively improves the fire resistance of the cable by adopting the design of arranging the mica tape outside the composite insulation layer, can withstand high-temperature flame burning for a long time, and ensures the use safety of the power cable.

In the technology, mica tape wrapping is adopted as a fire-resistant layer, however, the materials are easy to become brittle at high temperature, so that the flexibility of the cable is reduced, and the cable is difficult to bear frequent bending, so that the development of a bending-resistant fire-resistant power cable is urgently needed in the market to help people solve the existing problems.

Disclosure of utility model

The utility model aims to provide a bending-resistant fire-resistant power cable, which aims to solve the problems that in the prior art, mica tapes are adopted to wrap as fire-resistant layers, however, the materials are easy to become brittle at high temperature, so that the flexibility of the cable is reduced, and frequent bending is difficult to bear.

In order to achieve the purpose, the technical scheme is that the anti-bending fire-resistant power cable comprises a plurality of conductors, wherein fire-resistant insulating layers are arranged outside the plurality of conductors, a tensile layer is arranged outside the fire-resistant insulating layers, a metal shielding layer is arranged outside the tensile layer, a fire-retardant sheath layer is arranged outside the metal shielding layer, a reinforcing layer is arranged outside the fire-retardant sheath layer, a waterproof layer is arranged outside the reinforcing layer, a heat-insulating layer is arranged outside the waterproof layer, and an outer sheath layer is arranged outside the heat-insulating layer.

Preferably, the conductor is formed by twisting a plurality of soft copper wires, a galvanized layer is arranged on the surface of the conductor, a plurality of filling layers are filled outside the conductor and inside the fireproof insulating layer, and the filling layers are made of cotton rope materials.

Preferably, the fireproof insulating layer adopts a composite structure of ceramic silicon rubber and mica tape, the ceramic silicon rubber is coated outside the filling layer in an extrusion mode, and the mica tape is coated outside the ceramic silicon rubber in a wrapping mode.

Preferably, the tensile layer is formed by braiding aramid fibers, the tensile layer is coated outside the fireproof insulating layer in a braiding mode, the metal shielding layer is formed by braiding copper wires, and the metal shielding layer is coated outside the tensile layer in a braiding mode.

Preferably, the flame-retardant sheath layer is made of a low-smoke halogen-free flame-retardant polyolefin material, the flame-retardant sheath layer is coated outside the metal shielding layer in an extrusion mode, the reinforcing layer is formed by weaving steel wires, and the reinforcing layer is coated outside the flame-retardant sheath layer in a weaving mode.

Preferably, the waterproof layer is formed by wrapping an aluminum-plastic composite belt, the waterproof layer is coated outside the reinforcing layer in a wrapping mode, the heat insulation layer is formed by weaving glass fibers, and the heat insulation layer is coated outside the waterproof layer in a weaving mode.

Preferably, the outer sheath layer is made of polyurethane materials, and the outer sheath layer is coated outside the heat insulation layer in an extrusion mode.

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, the fireproof insulating layer with the composite structure of the ceramic silicon rubber and the mica tape is adopted, so that the cable flexibility is improved while the fireproof performance of the cable is ensured, and the cable can bear frequent bending.

(2) According to the utility model, the tensile layer woven by the aramid fiber is adopted, so that the tensile strength of the cable is effectively improved, the cable can bear larger external force pulling, and the service life of the cable is prolonged.

(3) According to the utility model, the flame-retardant sheath layer made of the low-smoke halogen-free flame-retardant polyolefin material is adopted, so that flame spread can be effectively prevented when a fire disaster occurs, toxic smoke is reduced, and the safety of the cable is improved.

Drawings

FIG. 1 is a front view of a kink resistant and fire resistant power cable of the present utility model;

FIG. 2 is a front cross-sectional view of the present utility model;

FIG. 3 is a side cross-sectional view of the present utility model;

fig. 4 is a schematic view of the structure of the refractory insulating layer of the present utility model.

1, Conductors; 101, a galvanized layer, 102, a filling layer, 2, a refractory insulating layer, 201, ceramic silicon rubber, 202, a mica tape, 3, a tensile layer, 4, a metal shielding layer, 5, a flame-retardant sheath layer, 6, a reinforcing layer, 7, a waterproof layer, 8, a heat insulation layer, 9 and an outer sheath layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-4, an embodiment of the utility model provides an anti-bending fire-resistant power cable, which comprises a conductor 1, wherein the conductor 1 is provided with a plurality of conductors, the conductor 1 is formed by stranding a plurality of strands of soft copper wires, the surface of the conductor 1 is provided with a galvanized layer 101, the conductivity and oxidation resistance of the conductor are improved, a fire-resistant insulating layer 2 is arranged outside the conductor 1, the plurality of conductors 1 are externally filled with a filling layer 102 inside the fire-resistant insulating layer 2, the filling layer 102 is made of cotton rope materials, the fire-resistant insulating layer 2 is made of a composite structure of ceramic silicon rubber 201 and mica tape 202, the ceramic silicon rubber 201 is coated outside the conductor 1 in an extrusion mode, the mica tape 202 is coated outside the ceramic silicon rubber 201 in a wrapping mode, the ceramic silicon rubber 201 can form a hard ceramic protection layer at high temperature, flame is effectively isolated, the mica tape 202 further enhances the mechanical strength and insulation performance of the fire-resistant insulating layer 2, the insulating layer 2 is externally provided with a tensile layer 3, the tensile layer 3 is formed by braiding aramid fiber, the tensile layer 3 is coated outside the fire-resistant insulating layer 2 in a braiding mode, the fire-resistant insulating layer has high-resistant fiber insulation layer 3, the metal wire is effectively shielded by the high-resistant shielding layer 4, the high-temperature shielding metal wire is effectively shielded, the metal wire is effectively shielded by the external shielding layer 4 is coated, the external resistance is effectively, and the external resistance is shielded by the metal wire is shielded, and the external layer is effectively shielded by the high, and the external resistance is shielded by the metal wire, and the high-resistant layer, and the metal layer is the wire is coated and the wire is the wire, and the high.

Referring to fig. 1, 2 and 3, a flame-retardant sheath layer 5 is arranged outside the metal shielding layer 4, the flame-retardant sheath layer 5 is made of a low-smoke halogen-free flame-retardant polyolefin material, the flame-retardant sheath layer 5 is coated outside the metal shielding layer 4 in an extrusion manner, and the low-smoke halogen-free flame-retardant polyolefin material can effectively prevent flame from spreading when a fire disaster occurs, reduce the generation of toxic smoke and improve the safety of the cable. The outside enhancement layer 6 that is provided with of fire-retardant restrictive coating 5, enhancement layer 6 adopts the steel wire to weave and forms, enhancement layer 6 is outside fire-retardant restrictive coating 5 through the mode cladding of weaving, steel wire weaving layer can effectively improve compressive strength and shock resistance of cable, make it can adapt to more abominable service environment, enhancement layer 6 outside is provided with waterproof layer 7, waterproof layer 7 adopts the plastic-aluminum composite tape to wind the package and forms, waterproof layer 7 is outside enhancement layer 6 through the mode cladding of winding the package, the plastic-aluminum composite tape has good waterproof performance and mechanical strength, can effectively prevent moisture infiltration, protection cable inner structure.

Referring to fig. 1, 2 and 3, the heat insulation layer 8 is arranged outside the waterproof layer 7, the heat insulation layer 8 is formed by weaving glass fibers, the heat insulation layer 8 is coated outside the waterproof layer 7 in a weaving mode, the glass fibers have good heat insulation performance and high temperature resistance, external high temperature can be effectively isolated, the internal structure of the cable is protected, the outer jacket layer 9 is arranged outside the heat insulation layer 8, the outer jacket layer 9 is made of polyurethane materials, the outer jacket layer 9 is coated outside the heat insulation layer 8 in an extrusion mode, the polyurethane materials have excellent wear resistance and tear resistance, the cable can be effectively protected from mechanical damage, and the service life of the cable is prolonged.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The bending-resistant fire-resistant power cable comprises conductors (1) and is characterized in that a plurality of conductors (1) are arranged, a fire-resistant insulating layer (2) is arranged outside the conductors (1), a tensile layer (3) is arranged outside the fire-resistant insulating layer (2), a metal shielding layer (4) is arranged outside the tensile layer (3), a flame-retardant sheath layer (5) is arranged outside the metal shielding layer (4), a reinforcing layer (6) is arranged outside the flame-retardant sheath layer (5), a waterproof layer (7) is arranged outside the reinforcing layer (6), a heat-insulating layer (8) is arranged outside the waterproof layer (7), and an outer sheath layer (9) is arranged outside the heat-insulating layer (8).

2. The bending-resistant fire-resistant power cable according to claim 1, wherein the conductors (1) are formed by twisting a plurality of strands of soft copper wires, a galvanized layer (101) is arranged on the surface of each conductor (1), a filling layer (102) is filled outside the plurality of conductors (1) and inside the fire-resistant insulating layer (2), and the filling layer (102) is made of cotton rope materials.

3. The bending-resistant fire-resistant power cable according to claim 1, wherein the fire-resistant insulating layer (2) is of a composite structure of ceramic silicon rubber (201) and mica tape (202), the ceramic silicon rubber (201) is coated on the outside of the filling layer (102) in an extrusion mode, and the mica tape (202) is coated on the outside of the ceramic silicon rubber (201) in a wrapping mode.

4. The bending-resistant fire-resistant power cable according to claim 1, wherein the tensile layer (3) is formed by braiding aramid fibers, the tensile layer (3) is coated on the outside of the fire-resistant insulating layer (2) in a braiding mode, the metal shielding layer (4) is formed by braiding copper wires, and the metal shielding layer (4) is coated on the outside of the tensile layer (3) in a braiding mode.

5. The bending-resistant fire-resistant power cable according to claim 1, wherein the flame-retardant sheath layer (5) is made of a low-smoke halogen-free flame-retardant polyolefin material, the flame-retardant sheath layer (5) is coated outside the metal shielding layer (4) in an extrusion coating mode, the reinforcing layer (6) is formed by weaving steel wires, and the reinforcing layer (6) is coated outside the flame-retardant sheath layer (5) in a weaving mode.

6. The bending-resistant fire-resistant power cable according to claim 1, wherein the waterproof layer (7) is formed by wrapping an aluminum-plastic composite belt, the waterproof layer (7) is wrapped outside the reinforcing layer (6) in a wrapping mode, the heat insulation layer (8) is formed by weaving glass fibers, and the heat insulation layer (8) is wrapped outside the waterproof layer (7) in a weaving mode.

7. The bending-resistant fire-resistant power cable according to claim 1, wherein the outer sheath layer (9) is made of polyurethane material, and the outer sheath layer (9) is coated outside the heat insulation layer (8) in an extrusion manner.