Novel flame-retardant cable

Abstract

The utility model discloses a novel flame-retardant cable, which belongs to the technical field of cables, and is characterized in that the novel flame-retardant cable comprises a cable main body, the cable main body comprises a conductor, an insulating layer, a sponge rubber filler, a flame-retardant fireproof layer and an adhesive high-flame-retardant sheath, the conductor is arranged inside the insulating layer, and the sponge rubber filler is arranged inside the flame-retardant fireproof layer. The high-flame-retardant sponge rubber filler, the flame-retardant fireproof layer, the adhesive high-flame-retardant sheath and other innovative structures are adopted, so that the problem that the flame-retardant performance of a small-specification flame-retardant cable is unqualified due to the factors of flammability, insulation, small filling area, thin sheath layer and the like is effectively solved; the high-flame-retardant sponge rubber filling can eliminate air in gaps, insulate heat and prevent combustion; the flame-retardant fireproof layer can form a flame-retardant fireproof wall to prevent heat transfer and combustion spread; the adhesive high-flame-retardant sheath can prevent combustion from spreading, stabilize the sheath and enhance the shell forming property and the blocking effect, so that the cable can better pass a bunching combustion test, and the high-flame-retardant requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, especially a novel flame -retardant cable. BACKGROUND

[0002] In recent years, a plurality of serious group death group fire accident has taken place in our country, and the fire caused by electrical reason becomes the main disaster factor, in order to effectively prevent fire, the flame -retardant performance of cable is clearly required in relevant specification, GB50217-2022 " electric power engineering cable design specification " and GB / T50311-2016 " integrated wiring system engineering design specification " stipulate that under the condition of the dense preparation of cable, flame -retardant cable should be selected, simultaneously, the " flame -retardant wire and cable CCC authentication reference manual " released by CQC also further promotes the application of flame -retardant cable, therefore, the demand of market to flame -retardant cable increases greatly.

[0003] However, the common flame -retardant cable structure currently has certain limitation, the existing flame -retardant cable is usually composed of conductor, insulating layer, flame -retardant filling rope, glass fiber tape, high flame -retardant sheath, for the flame -retardant cable of nominal cross section greater than or equal to 4mm 2 , adopting this structure can smoothly pass the bundle burning test stipulated in GB / T19666-2019 standard, but for the small -size flame -retardant cable (such as cross section 0.5-1mm 2 ) of flammable insulating material (such as EPR, PE, XLPE), there are many problems leading to unqualified flame -retardant performance, specifically, due to the flammable insulating material, the total area of core gap is small, the sheath is thin, the temperature resistance of glass fiber tape is limited (about 600 DEG C), and the flame -retardant filling is loose, etc., in the process of cable burning test, the sheath cannot form shell and fall off from the glass fiber tape, the flame is easy to spread to the axial direction and the inside of cable, finally leads to the cable cannot pass the bundle burning test stipulated in GB / T19666-2019 standard, these problems seriously limit the application of small -size flame -retardant cable in some places with higher fire safety requirements.

[0004] Therefore, a novel flame -retardant cable is provided. Utility model content

[0005] The utility model aims at providing a novel flame -retardant cable, can solve the problem of unqualified flame -retardant performance of the existing small -size flame -retardant cable of flammable insulating, small filling area and thin sheath, improve the flame -retardant performance of cable, satisfy the demand of market to high flame -retardant performance cable, and guarantee fire safety.

[0006] To achieve the above object, the utility model provides the following technical scheme: A novel flame -retardant cable, including cable main part, the cable main part includes conductor, insulating layer, sponge rubber filling, flame -retardant fireproof layer and adhesive high flame -retardant sheath, the conductor is arranged in the inside of insulating layer, the sponge rubber filling is arranged at the cable core gap, the flame -retardant fireproof layer is arranged between the cable core and adhesive high flame -retardant sheath.

[0007] Preferably, the sponge rubber filling is made of high flame -retardant sponge rubber, and the oxygen index is greater than or equal to 42.

[0008] Preferably, the flame -retardant fireproof layer is made of basalt fiber flame -retardant fireproof tape, and the oxygen index is greater than or equal to 70.

[0009] Preferably, the flame -retardant fireproof layer is arranged on the surface of the sponge rubber filling in an overlapping wrapping mode, and the overlapping rate is greater than or equal to 30%.

[0010] Preferably, the insulating layer is made of EI4 type ethylene-propylene insulating rubber, and is extruded on the surface of the conductor.

[0011] Preferably, the adhesive high flame -retardant sheath is made of XH-03A type high flame -retardant rubber, and is extruded on the surface of the flame -retardant fireproof layer.

[0012] Preferably, the adhesive high flame -retardant sheath has an oxygen index greater than or equal to 40 and has adhesion.

[0013] Preferably, the number of conductors is several, and the conductors are arranged in a ring shape inside the flame -retardant fireproof layer, and the conductors are twisted by the fifth soft copper conductor.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The application adopts high flame -retardant sponge rubber filling, flame -retardant fireproof layer and adhesive high flame -retardant sheath, effectively solves the problem of unqualified flame -retardant performance of small -size flame -retardant cable due to flammable insulation, small filling area and thin sheath layer, the high flame -retardant sponge rubber filling can eliminate gap air, heat insulation and prevent combustion, the flame -retardant fireproof layer can form a flame -retardant firewall to prevent heat transfer and combustion spread, and the adhesive high flame -retardant sheath can prevent combustion spread, stabilize the sheath, and enhance the shell formation and blocking effect, so that the cable can pass the bundle combustion test better, meet the high flame -retardant requirement, and the components cooperate with each other, not only improve the flame -retardant performance of the cable, but also ensure the electrical performance and structural stability of the cable under normal operation and fire conditions, reduce the risk of fire caused by the cable, provide a powerful guarantee for power safety, the structure of the novel flame -retardant cable is reasonable, can be applied to different laying environments and application scenarios, especially for places with high flame -retardant performance requirements, such as public buildings with high population density, underground facilities and the like, and has a wide application prospect. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the novel flame-retardant cable of this utility model;

[0017] Figure 2 This is an exploded view of the cable body of this utility model.

[0018] In the diagram, 1 is the cable body; 2 is the conductor; 3 is the insulation layer; 4 is the sponge rubber filler; 5 is the flame-retardant fireproof layer; and 6 is the highly adhesive flame-retardant sheath. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-2 The present invention provides the following technical solution:

[0021] A novel flame-retardant cable includes a cable body 1, which comprises a conductor 2, an insulation layer 3, a sponge rubber filler 4, a flame-retardant and fireproof layer 5, and an adhesive high flame-retardant sheath 6. The conductor 2 is disposed inside the insulation layer 3, the sponge rubber filler 4 is disposed at the gap between the cable cores, and the flame-retardant and fireproof layer 5 is disposed between the cable cores and the adhesive high flame-retardant sheath 6.

[0022] In this embodiment, by adopting innovative structures such as high flame-retardant sponge rubber filler 4, flame-retardant fireproof layer 5, and adhesive high flame-retardant sheath 6, the problem of substandard flame-retardant performance of small-diameter flame-retardant cable body 1 due to factors such as flammable insulation, small filling area, and thin sheath layer is effectively solved. High flame-retardant sponge rubber filler 4 can eliminate gap air, provide heat insulation, and prevent combustion; flame-retardant fireproof layer 5 can form a flame-retardant firewall to prevent heat transfer and combustion spread; adhesive high flame-retardant sheath 6 can prevent combustion spread, stabilize the sheath, and enhance shell formation and blocking effect, enabling cable body 1 to better pass the bundled combustion test and meet high flame-retardant requirements. The synergistic effect of each component not only improves the flame-retardant performance of cable body 1, but also ensures the electrical performance and structural stability of cable body 1 under normal operation and fire conditions, reducing the risk of fire caused by cable body 1, and providing strong protection for electrical safety. The structural design of this new type of flame-retardant cable is reasonable and can be applied to different laying environments and application scenarios, especially for places with high requirements for flame-retardant performance, such as densely populated public buildings and underground facilities, and has broad application prospects.

[0023] Specifically, as shown in Figure 2 The sponge rubber filling 4 is made of high-flame-retardant sponge rubber, and the oxygen index is ≥42.

[0024] Specifically, as shown in Figure 2 The flame-retardant fireproof layer 5 is made of basalt fiber flame-retardant fireproof tape, and the oxygen index is ≥70.

[0025] Specifically, as shown in Figure 2 The flame-retardant fireproof layer 5 is arranged on the surface of the sponge rubber filling 4 in an overlapping wrapping manner, and the overlapping rate is not less than 30%.

[0026] In this embodiment: by making the sponge rubber filling 4 of high-flame-retardant sponge rubber with an oxygen index ≥42, under the high-temperature conditions of cable sheath extrusion vulcanization, the blowing agent decomposes to produce closed pores, causing the filling strip formed by the high-flame-retardant sponge rubber to expand, which can fill the gap between the cable core and the outer tape, expel the air in the gap, effectively prevent combustion, and further prevent heat from transferring to the inside of the cable body 1 by utilizing the heat insulation performance of the high-flame-retardant sponge rubber, thereby preventing the flame from spreading in the axial and internal directions of the cable body 1, and preventing and isolating combustion by utilizing the high-flame-retardant property of the sponge rubber, which significantly improves the flame-retardant performance of the cable body 1 from multiple aspects and solves the problem of flame retardation of small-size flame-retardant cables caused by the gap factor; the flame-retardant fireproof layer 5 is made of basalt fiber flame-retardant fireproof tape with an oxygen index ≥70, and the basalt fiber has the characteristics of non-combustibility, good thermal insulation, no deformation, no bursting, no melting or dripping under the action of flame, high strength, no thermal shrinkage, etc., which can completely prevent and isolate combustion outside the cable core and form a reliable flame-retardant firewall, thereby preventing heat from transferring to the inside and axial direction of the cable body 1, and more effectively improving the flame-retardant performance of the cable body 1 compared to other materials, providing stronger protection for the cable body 1 in a fire environment and reducing the risk of fire.

[0027] Specifically, as shown in Figure 2 The insulation layer 3 is made of EI4 type ethylene-propylene insulation rubber, and is extruded on the surface of the conductor 2.

[0028] In this embodiment: by making the insulation layer 3 of EI4 type ethylene-propylene insulation rubber, the EI4 type ethylene-propylene insulation rubber has good insulation performance, which can provide reliable insulation protection for the conductor 2 to prevent current leakage and short circuit and other problems, and ensure the stability of the electrical performance of the cable body 1, and the extrusion process can make the insulation layer 3 tightly wrap the conductor 2, improve the overall structural stability and durability of the cable body 1, and ensure the safe operation of the cable body 1 during long-term use.

[0029] Specifically, as shown in Figure 2As shown, the adhesive high flame-retardant sheath 6 is made of XH-03A high flame-retardant rubber, and is extruded on the surface of the flame-retardant fireproof layer 5.

[0030] Specifically, as shown in the figure, Figure 2 The adhesive high flame-retardant sheath 6 has an oxygen index of ≥40 and has adhesion.

[0031] In this embodiment: by the adhesive high flame-retardant sheath 6 being made of XH-03A high flame-retardant rubber, the XH-03A high flame-retardant rubber has high flame-retardant performance, as a sheath material, can effectively prevent the spread of combustion to the cable main body 1 in the axial and radial directions, and through the extrusion process, the sheath can be tightly combined with the flame-retardant fireproof layer 5, enhancing the overall protection performance of the cable main body 1, providing external protection for the cable main body 1, prolonging the service life of the cable main body 1, and better playing a flame-retardant role in the event of a fire; the high oxygen index ensures that the sheath itself has good flame-retardant ability, which can effectively prevent the spread of flame, and the adhesion makes the sheath layer more firmly and stably on the surface of the flame-retardant fireproof layer 5, and does not fall off or burst during combustion, ensuring the integrity of the flame-retardant structure, thereby improving the flame-retardant effect, at the same time, the good self-adhesion also enhances the combustion crust and carbonization, further improving the blocking effect of flame and heat, greatly improving the flame-retardant performance of the cable main body 1 and the safety in a fire environment.

[0032] Specifically, as shown in the figure, Figure 2 The number of conductors 2 is several, and the conductors 2 are arranged in a ring inside the flame-retardant fireproof layer 5, and the conductors 2 are twisted by the fifth kind of soft copper conductor.

[0033] In this embodiment: by the number of conductors 2 being several and being arranged in a ring inside the flame-retardant fireproof layer 5, and being twisted by the fifth kind of soft copper conductor, the several conductors 2 arranged in a ring can meet different power transmission needs, improving the applicability of the cable main body 1, and the fifth kind of soft copper conductor has good flexibility, facilitating the bending of the cable main body 1 during laying, and adapting to various complex installation environments; at the same time, its excellent conductivity can reduce the resistance of the conductors 2, reduce the loss in the process of power transmission, improve the power transmission efficiency, and ensure that the cable main body 1 can stably and efficiently transmit power.

[0034] Working principle: when the cable body 1 is used, by adopting the innovative structure of high-flame-retardant sponge rubber filling 4, flame-retardant fireproof layer 5 and adhesive high-flame-retardant sheath 6, the problem of unqualified flame-retardant performance of small-specification flame-retardant cables caused by flammable insulation, small filling area, thin sheath layer and other factors is effectively solved; the high-flame-retardant sponge rubber filling 4 can exclude air gap, insulate and prevent combustion; the flame-retardant fireproof layer 5 can form a flame-retardant firewall to prevent heat transfer and combustion spread; the adhesive high-flame-retardant sheath 6 can prevent combustion spread, stabilize the sheath and enhance the encapsulation and blocking effects, so that the cable body 1 can better pass the bundled burning test, meet the high-flame-retardant requirement, and the synergistic effect of various components not only improves the flame-retardant performance of the cable body 1, but also ensures the electrical performance and structural stability of the cable body 1 under normal operation and fire conditions, reduces the risk of fire caused by the cable body 1, and provides a strong guarantee for electrical safety; the structure design of the novel flame-retardant cable is reasonable, and the novel flame-retardant cable can be applied to different laying environments and application scenarios, especially for places with high flame-retardant performance requirements, such as densely populated public buildings and underground facilities, and has a wide application prospect.

[0035] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A novel fire retardant cable comprising a cable body (1) characterized in that: The cable body (1) comprises a conductor (2), an insulation layer (3), a sponge rubber filling (4), a fire-retardant fireproof layer (5) and a high-adhesion fire-retardant sheath (6), the conductor (2) is arranged inside the insulation layer (3), the sponge rubber filling (4) is arranged at the cable core gap, and the fire-retardant fireproof layer (5) is arranged between the cable core and the high-adhesion fire-retardant sheath (6).

2. A novel fire retardant cable as claimed in claim 1, wherein: The sponge rubber filling (4) is made of high-adhesion fire-retardant sponge rubber, and the oxygen index is greater than or equal to 42.

3. A novel fire retardant cable as claimed in claim 1, wherein: The fire-retardant fireproof layer (5) is made of basalt fiber fire-retardant fireproof tape, and the oxygen index is greater than or equal to 70.

4. A novel fire retardant cable as claimed in claim 1, wherein: The fire-retardant fireproof layer (5) is arranged on the surface of the sponge rubber filling (4) in an overlapping wrapping mode, and the overlapping rate is not less than 30%.

5. A novel fire retardant cable as claimed in claim 1, wherein: The insulation layer (3) is made of EI4 type ethylene-propylene insulation rubber, and is extruded on the surface of the conductor (2).

6. A novel fire retardant cable as claimed in claim 1, wherein: The high-adhesion fire-retardant sheath (6) is made of XH-03A type high-adhesion fire-retardant rubber, and is extruded on the surface of the fire-retardant fireproof layer (5).

7. A novel fire retardant cable as claimed in claim 6, wherein: The oxygen index of the high-adhesion fire-retardant sheath (6) is greater than or equal to 40, and the high-adhesion fire-retardant sheath (6) has adhesion.

8. A novel fire retardant cable as claimed in claim 1, wherein: The number of the conductors (2) is several, and the conductors (2) are arranged in a ring shape inside the fire-retardant fireproof layer (5), and the conductors (2) are twisted by the fifth type of soft copper conductor.

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