Environment-friendly fireproof cable

Abstract

The utility model discloses an environment-friendly fireproof cable, which relates to the technical field of fireproof cables and sequentially comprises a protective layer, a belting layer, a flame-retardant layer and a hard layer from outside to inside, a plurality of groups of oxygen barrier layers are arranged in the hard layer, a group of cable cores are wrapped in each group of oxygen barrier layer, and a plurality of groups of cable cores are arranged in the cable cores. A plurality of groups of first filling layers and a plurality of groups of second filling layers are arranged in the flame-retardant layer, the plurality of groups of oxygen isolation layers are circumferentially and uniformly distributed by taking the axis of the hard layer as the center, and the plurality of groups of first filling layers and second filling layers are circumferentially and uniformly distributed by taking the axis of the hard layer as the center; the cable core comprises a cable core, the cable core is coated with a fireproof layer, the fireproof layer is coated with an insulating layer, the first filling layer and the second filling layer are both fan-shaped, the first filling layer and the second filling layer are arranged concentrically towards the outer side circumference, the first filling layer and the second filling layer are arranged in a staggered mode, and the first filling layer and the second filling layer are arranged in a staggered mode. The device has the characteristic of improving the fire resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-resistant cables, in particular to an environment-friendly fire-resistant cable. Background Art

[0002] With the rapid development of urbanization, the demand for fire-resistant cables continues to be strong. The existing cables have poor fire-resistant capabilities, and when the fire-resistant cables are subjected to external forces, the effect of resisting external forces is poor, and the protection effect on the conductors inside the fire-resistant cables is poor. As a result, when the fire-resistant cables are subjected to external forces, the conductors inside the fire-resistant cables will be damaged, thus affecting the normal use of the fire-resistant cables.

[0003] A fire-resistant cable with the publication number of CN219497396U includes a fire-resistant cable matrix. A fire-resistant rubber protection layer is fixedly connected to the surface of the fire-resistant cable matrix. A first flame retardant layer is embedded in the fire-resistant rubber protection layer. A fire-resistant silica gel protection layer is fixedly connected to the surface of the fire-resistant rubber protection layer. First, the flame retardant masterbatch layer prolongs the time of being burned by the flame inside the fire-resistant cable matrix. Then, the fire-resistant rubber protection layer, the first flame retardant layer, the fire-resistant silica gel protection layer, and the flame retardant resin composition layer block the flame layer by layer. Finally, the flame retardant viscose fiber layer, the second flame retardant layer, and the gas barrier aerogel layer strengthen the time that the fire-resistant cable matrix is burned by the flame, thus having the advantage of good fire protection effect, replacing the existing method of using low-halogen and low-smoke flame retardant materials for fire protection of fire-resistant cables, and improving the fire resistance duration of the fire-resistant cables when burned by the flame.

[0004] Although this structure can improve the fire resistance duration of the fire-resistant cable, it does not have good extrusion resistance. Therefore, when affected by external forces, the fire resistance ability of the fire-resistant cable will be reduced. This phenomenon has become an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] The purpose of the utility model is to provide an environment-friendly fire-resistant cable for the existing technical defects to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the utility model provides the following technical solution: An environment-friendly fire-resistant cable includes a protection layer, a tape layer, a flame retardant layer, and a hard layer from outside to inside in sequence. A plurality of oxygen isolation layers are provided in the hard layer, and each group of oxygen isolation layers wraps a group of cable cores.

[0007] A number of first filling layers and a number of second filling layers are provided in the flame retardant layer.

[0008] The utility model further explains that the plurality of oxygen isolation layers are evenly distributed circumferentially around the axis of the hard layer.

[0009] The present utility model is further described as follows. A plurality of groups of the first filling layer and the second filling layer are evenly distributed in a circumferential manner with the axis of the rigid layer as the center.

[0010] The present utility model is further described as follows. The first filling layer is arranged concentrically and circumferentially outward relative to the second filling layer, and the first filling layer and the second filling layer are arranged in a circumferential dislocation manner.

[0011] The present utility model is further described as follows. The cable core includes a wire core, a fire-resistant layer is coated on the outer side of the wire core, and an insulating layer is coated on the outer side of the fire-resistant layer.

[0012] The present utility model is further described as follows. Both the first filling layer and the second filling layer are fan-shaped.

[0013] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: In the present utility model, by arranging the rigid layer to separate and protect the cable core, the anti-extrusion strength of the cable core is improved.

[0014] The cable core is subjected to multi-layer flame retardant and fire-resistant protection through the oxygen isolation layer and the flame retardant layer. At the same time, the flame retardant layer has a certain insulating effect.

[0015] By arranging the first filling layer and the second filling layer in the flame retardant layer, while improving the heat insulation and fire prevention ability of the cable to heat sources, it has a certain effect of buffering the external extrusion force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is the overall structural schematic diagram of the present utility model;

[0018] In the figure: 1, rigid layer; 2, oxygen isolation layer; 3, cable core; 4, wire core; 5, fire-resistant layer; 6, insulating layer; 7, flame retardant layer; 8, first filling layer; 9, second filling layer; 10, tape layer; 11, protective layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the technical solution of the present utility model in a non-limiting and detailed manner in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figure 1, the present utility model provides a technical solution: an environmentally friendly fireproof cable, including a hard layer 1, and multiple oxygen isolation layers 2 are provided in the hard layer 1. Specifically, there are three oxygen isolation layers 2, and the three oxygen isolation layers 2 are evenly distributed in a circle with the axis of the hard layer 1 as the center, and each oxygen isolation layer 2 wraps a cable core 3.

[0021] The material of the oxygen isolation layer 2 is a ceramized polyolefin flame retardant and fireproof material, which can quickly form a ceramic body with a certain strength in a flame and high-temperature environment, playing the role of flame retardancy, heat insulation, and oxygen isolation.

[0022] The material of the hard layer 1 includes but is not limited to supporting and protecting materials such as hard rubber, which is used to protect the cable core 3 from mechanical external forces and improve the overall anti-extrusion ability of the cable.

[0023] The three cable cores 3 include wire cores 4, a fireproof layer 5 is coated on the outside of the wire cores 4, and an insulating layer 6 is coated on the outside of the fireproof layer 5.

[0024] The wire core 4 is made of a conductive metal material such as copper and is used for conductive transmission.

[0025] The material of the fireproof layer 5 includes but is not limited to materials such as mica tape, which has strong high-temperature resistance and combustion resistance and is used to improve the fireproof performance of the cable core 3.

[0026] The material of the insulating layer 6 includes but is not limited to materials such as resin, polyvinyl chloride, and silicone rubber, which are used to protect the wire core 4 and prevent the cable core 3 from leaking electricity.

[0027] A flame retardant layer 7 is coated on the outside of the hard layer 1. The material of the flame retardant layer 7 includes but is not limited to materials such as polyolefin polymers and fluoroplastics, which have high heat resistance and fire resistance, and at the same time have an insulating effect, and can protect the cable core 3 to have the performance of continuously transmitting electricity under fire conditions.

[0028] Several first filling layers 8 and several second filling layers 9 are provided in the flame retardant layer 7.

[0029] Both the first filling layer 8 and the second filling layer 9 are evenly distributed in a circle with the axis of the hard layer 1 as the center. The first filling layer 8 is arranged concentrically and outward in a circle compared with the second filling layer 9, and the first filling layer 8 and the second filling layer 9 are arranged in a circumferential dislocation. Specifically, there are eight first filling layers 8 and second filling layers 9, and they are all fan-shaped, and the second filling layer 9 is circumferentially misaligned by 22.5° relative to the first filling layer 8.

[0030] The first filling layer 8 is filled with a flame retardant. The material of the flame retardant includes but is not limited to materials such as magnesium hydroxide and alumina. When a fire occurs, the flame retardant releases moisture and inert gases to inhibit the spread of the flame and improve the flame retardant performance of the cable.

[0031] The second filling layer 9 is filled with heat-insulating and fireproof materials, including but not limited to mineral fillers, polystyrene foam, silicone fillers and other materials, which have good high-temperature resistance and flame retardant properties, reduce the oxygen content and heat transfer speed in the internal voids, prevent the heat source outside the cable from conducting to the inside, and further reduce the fire risk.

[0032] The outside of the flame retardant layer 7 is covered with a tape layer 10. The materials of the tape layer 10 include but not limited to fiberglass tape and other materials, which have the characteristics of extremely strong tensile strength, wrinkle resistance, break resistance, sulfur resistance, smokeless, halogen-free, non-toxic, non-combustible in pure oxygen, and good insulation, improving the fire resistance of the cable.

[0033] The outside of the tape layer 10 is covered with a protective layer 11. The materials of the protective layer 11 include but not limited to halogen-free and low-smoke materials such as polyethylene, polyvinyl chloride or thermoplastic polyurethane, which have the characteristics of fire resistance, environmental protection and safety, corrosion resistance, etc., and improve the service life of the cable.

[0034] In this embodiment, by setting the hard layer 1 to separate and protect the cable core 3, the anti-extrusion strength of the cable core 3 is improved. At the same time, the cable core 3 is protected by multiple layers of flame retardant and fire resistance through the oxygen isolation layer 2 and the flame retardant layer 7. At the same time, the flame retardant layer 7 has a certain insulation effect.

[0035] At the same time, a first filling layer 8 and a second filling layer 9 are arranged in the flame retardant layer 7, which can improve the heat insulation and fire protection ability of the cable against heat sources, and at the same time has a certain effect of buffering the external extrusion force.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An environmentally friendly fireproof cable, comprising, from the outside to the inside, a protective layer (11), a tape layer (10), a flame retardant layer (7) and a hard layer (1), characterized in that: The hard layer (1) is provided with a plurality of groups of oxygen-isolating layers (2), each group of the oxygen-isolating layers (2) wraps a group of cable cores (3), and the flame-retardant layer (7) is provided with a plurality of groups of first filling layers (8) and a plurality of groups of second filling layers (9).

2. The environmentally friendly fireproof cable according to claim 1, characterized in that: The plurality of oxygen-isolating layers (2) are evenly distributed around the circumference of the hard layer (1) with the axis as the center.

3. The environmentally friendly fireproof cable according to claim 2, characterized in that: A plurality of groups of the first filling layers (8) and the second filling layers (9) are evenly distributed in a circle with the axis of the hard layer (1) as the center.

4. The environmentally friendly fireproof cable according to claim 3, characterized in that: The first filling layer (8) is arranged concentrically and outwardly circumferentially relative to the second filling layer (9), and the first filling layer (8) and the second filling layer (9) are arranged circumferentially in an offset manner.

5. The environmentally friendly fireproof cable according to claim 4, characterized in that: The cable core (3) comprises a wire core (4), the outer side of the wire core (4) is coated with a fire-resistant layer (5), and the outer side of the fire-resistant layer (5) is coated with an insulating layer (6).

6. The environmentally friendly fireproof cable according to claim 5, characterized in that: The first filling layer (8) and the second filling layer (9) are both fan-shaped.

Images