Fireproof cable

Abstract

The utility model belongs to the technical field of cables, and discloses a fireproof cable which comprises an outer sheath layer, a flame-retardant layer is arranged in the outer sheath layer, an isolation layer is arranged in the flame-retardant layer, a heat-insulation filling layer is arranged in the isolation layer, a reinforcing layer is arranged in the heat-insulation filling layer, and a fireproof layer is arranged in the reinforcing layer. An insulating protection layer is arranged in the reinforcing layer, a plurality of inner sheath layers which are uniformly distributed along the circumference in an array manner are arranged in the insulating protection layer, and wire cores are arranged in the inner sheath layers. According to the cable, the outer sheath layer and the inner sheath layer are formed by the ceramic silicone rubber sleeves, the ceramic silicone rubber has excellent fireproof, flame-retardant, low-smoke and non-toxic characteristics, the extrusion molding process is simple, and residues after combustion are hard ceramic shells and can be attached to the outer wall of the cable when the outer wall of the cable suffers from a fire, so that the cable is prevented from being damaged, and the service life of the cable is prolonged. And a fireproof effect is continuously provided for the cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a fireproof cable. Background Technology

[0002] Electric wires and cables are widely used in various construction projects. In recent years, in order to improve the safety level of electrical circuits and reduce the occurrence and losses of electrical fire accidents, the Ministry of Construction, the Ministry of Public Security and some local governments have successively issued some electrical design specifications, and clearly stipulated that fire-resistant cables must be used in some important electrical circuits and places, thereby further expanding the application scope of fire-resistant cables.

[0003] A fireproof cable is disclosed in Chinese utility model patent with publication number CN 209591629 U, which solves the problem of shortening the service life of cables and achieves the effect of extending the service life of cables.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: the fireproof cables use only one type of fireproof material and have only one type of sheath function, which does not have fireproof performance. This results in poor fireproof performance of the cable's outer surface, and the surface is prone to melting when heated. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a fireproof cable.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a fireproof cable, comprising an outer sheath layer, an inner flame-retardant layer, an inner isolation layer, an inner heat-insulating filling layer, an inner reinforcement layer, an inner insulation protective layer, and an inner plurality of inner sheath layers evenly distributed along the circumference, and a wire core is disposed inside the inner sheath layer.

[0007] By adopting the above technical solution, through the setting of outer sheath layer, flame retardant layer, isolation layer, heat insulation filling layer, reinforcement layer, insulation protection layer, inner sheath layer and wire core, multiple fire protection capabilities are provided for the inside and outside of the cable, enhancing the fire protection effect of the cable and making its functions more diverse.

[0008] Furthermore, both the outer sheath layer and the inner sheath layer are ceramicized silicone rubber sleeves.

[0009] By adopting the above technical solution, and by setting an outer sheath layer and an inner sheath layer composed of ceramicized silicone rubber, ceramicized silicone rubber has excellent fireproof, flame-retardant, low-smoke, and non-toxic properties. The extrusion molding process is simple, and its residue after combustion is a hard ceramicized shell, which can adhere to the outer wall of the cable when the cable is exposed to fire, and continue to provide fireproof effect for the cable.

[0010] Furthermore, the reinforcing layer is a silicone rubber layer, and the interior of the reinforcing layer is provided with a plurality of connecting grooves, and a connecting strip is slidably connected inside each of the plurality of connecting grooves, the connecting strip being fixedly connected to the outer wall of the insulating protective layer.

[0011] By adopting the above technical solution and setting a reinforcing layer composed of silicone rubber, the fire resistance of the cable can be effectively improved. Furthermore, the ceramicized silicone rubber is soft and elastic, protecting the layers inside it. The connecting grooves and strips enhance the toughness of the reinforcing layer, improving the cable's tensile strength and tensile performance.

[0012] Furthermore, the flame-retardant layer is flame-retardant polyurethane foam, and the insulating layer is a thick plastic film.

[0013] By adopting the above technical solution and setting a flame-retardant layer composed of flame-retardant polyurethane foam, the flame-retardant and fire-resistant effects of the cable are further enhanced.

[0014] Furthermore, the insulating protective layer is made of fiberglass rock wool woven fabric, and the inner wall of the insulating protective layer is provided with a plain-weave copper shielding mesh.

[0015] By adopting the above technical solution, and by setting an insulating protective layer composed of fiberglass rock wool and a plain-weave copper shielding mesh, the insulation performance of the cable is enhanced, and its weather resistance is good.

[0016] Furthermore, the heat insulation filling layer is a ceramic fiber filling layer.

[0017] By adopting the above technical solution and setting a heat insulation filling layer composed of ceramic fiber filling layer, the cable has the effects of being lightweight, high temperature resistant, having good thermal stability, and low thermal conductivity.

[0018] Furthermore, the inner wall of the connecting groove is arc-shaped, and several connecting grooves are evenly distributed in an array along the circumference.

[0019] By adopting the above technical solution and setting an arc-shaped connecting groove, it better conforms to the inner wall of the cable and provides support for the inner wall of the cable.

[0020] Furthermore, a fireproof layer, which is fireproof cotton, is provided between the outer wall of the inner sheath and the insulating protective layer.

[0021] By adopting the above technical solution and setting a fireproof layer made of fireproof cotton, the core of the cable is better protected, while the internal fire resistance and fireproof effect of the cable are enhanced.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. In this application, by setting an outer sheath layer and an inner sheath layer composed of ceramicized silicone rubber, the ceramicized silicone rubber has excellent fireproof, flame-retardant, low-smoke, and non-toxic properties. The extrusion molding process is simple, and its residue after combustion is a hard ceramicized shell, which can adhere to the outer wall of the cable when the cable is exposed to fire, and continue to provide fireproof effect for the cable.

[0024] 2. In this application, by setting a flame-retardant layer composed of flame-retardant polyurethane foam, the flame-retardant and fire-resistant effects of the cable are further enhanced. By setting an isolation layer composed of thick plastic film, external oxygen is blocked from entering the cable, thus enhancing the fire resistance of the cable. By setting a heat-insulating filling layer composed of ceramic fiber filling layer, the cable has the effects of being lightweight, high temperature resistant, having good thermal stability, and low thermal conductivity.

[0025] 3. In this application, the fire resistance of the cable can be effectively improved by setting a reinforcing layer composed of a silicone rubber layer. Furthermore, the ceramicized silicone rubber is soft and elastic, protecting the layers inside it. The connecting grooves and strips enhance the toughness of the reinforcing layer, improving the cable's tensile strength and tensile effect. The fireproof layer composed of fireproof cotton further protects the cable core, enhancing the cable's internal fire resistance and fireproofing effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0027] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the insulating protective layer and the connecting strip in the embodiment of this utility model.

[0029] In the diagram: 1. Outer sheath layer; 2. Flame retardant layer; 3. Insulation layer; 4. Heat insulation filling layer; 5. Reinforcing layer; 6. Insulation protection layer; 61. Connecting strip; 62. Connecting groove; 7. Inner sheath layer; 71. Wire core; 72. Fireproof layer. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] like Figure 1-3 As shown in the figure, this application discloses a fireproof cable, including an outer sheath layer 1, a flame-retardant layer 2 disposed inside the outer sheath layer 1, an isolation layer 3 disposed inside the flame-retardant layer 2, a heat-insulating filling layer 4 disposed inside the isolation layer 3, a reinforcing layer 5 disposed inside the heat-insulating filling layer 4, an insulating protective layer 6 disposed inside the reinforcing layer 5, and a plurality of inner sheath layers 7 uniformly arrayed along the circumference disposed inside the insulating protective layer 6, with wire cores 71 disposed inside the inner sheath layers 7.

[0032] Both the outer sheath layer 1 and the inner sheath layer 7 are ceramicized silicone rubber sleeves.

[0033] The reinforcing layer 5 is a silicone rubber layer. The interior of the reinforcing layer 5 is provided with a plurality of connecting grooves 62. Each of the plurality of connecting grooves 62 is slidably connected with a connecting strip 61. The connecting strip 61 is fixedly connected to the outer wall of the insulating protective layer 6. The plurality of connecting grooves 62 are evenly distributed in an array along the circumference.

[0034] The flame-retardant layer 2 is flame-retardant polyurethane foam, and the isolation layer 3 is a thick plastic film. The insulating protective layer 6 is fiberglass rock wool woven fabric, and the inner wall of the insulating protective layer 6 is provided with a plain-weave copper shielding mesh.

[0035] The heat insulation filling layer 4 is a ceramic fiber filling layer.

[0036] The reinforcing layer 5 is made of insulating ethylene propylene rubber, and the inner wall of the connecting groove 62 is arc-shaped.

[0037] A fireproof layer 72 is provided between the outer wall of the inner sheath layer 7 and the insulating protective layer 6, and the fireproof layer 72 is fireproof cotton.

[0038] The working principle of a fireproof cable in this embodiment is as follows: During use, an outer sheath layer 1 and an inner sheath layer 7 composed of ceramicized silicone rubber are provided. Ceramicized silicone rubber has excellent fireproof, flame-retardant, low-smoke, and non-toxic properties. The extrusion molding process is simple, and its residue after combustion is a hard ceramicized shell, which can adhere to the outer wall of the cable when it is exposed to fire, continuing to provide fire protection for the cable. A flame-retardant layer 2 composed of flame-retardant polyurethane foam is provided to further enhance the flame-retardant and fireproof effects of the cable. An isolation layer 3 composed of a thick plastic film is provided to block external oxygen from entering the cable, enhancing the cable's fire resistance. A heat-insulating filling layer 4 composed of ceramic fiber filling layer is provided to make the cable lightweight, high-temperature resistant, thermally stable, and with low thermal conductivity. A reinforcing layer 5 composed of silicone rubber layer is provided to effectively improve the cable's fire resistance. Furthermore, the ceramicized silicone rubber is soft and elastic, which can protect the layers set on its inner side. The connecting groove 62 and connecting strip 61 can enhance the toughness of the reinforcing layer 5 and improve the tensile strength and tensile effect of the cable. The fireproof layer 72 made of fireproof cotton can improve the protection of the cable core 71 and enhance the fireproof ability and fireproof effect inside the cable.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A fireproof cable, comprising an outer sheath (1), characterized in that: The outer sheath layer (1) is provided with a flame-retardant layer (2), the flame-retardant layer (2) is provided with an isolation layer (3), the isolation layer (3) is provided with a heat-insulating filling layer (4), the heat-insulating filling layer (4) is provided with a reinforcing layer (5), the reinforcing layer (5) is provided with an insulating protective layer (6), the insulating protective layer (6) is provided with a plurality of inner sheath layers (7) evenly distributed along the circumference, and the inner sheath layer (7) is provided with a wire core (71).

2. The fireproof cable according to claim 1, characterized in that: Both the outer sheath layer (1) and the inner sheath layer (7) are ceramicized silicone rubber sleeves.

3. The fireproof cable according to claim 1, characterized in that: The reinforcing layer (5) is a silicone rubber layer. The interior of the reinforcing layer (5) is provided with a plurality of connecting grooves (62). Each of the plurality of connecting grooves (62) is slidably connected with a connecting strip (61). The connecting strip (61) is fixedly connected to the outer wall of the insulating protective layer (6).

4. A fireproof cable according to claim 1, characterized in that: The flame-retardant layer (2) is flame-retardant polyurethane foam, and the isolation layer (3) is a thick plastic film.

5. A fireproof cable according to claim 1, characterized in that: The insulating protective layer (6) is made of fiberglass rock wool woven fabric, and the inner wall of the insulating protective layer (6) is provided with a plain-weave copper shielding mesh.

6. A fireproof cable according to claim 1, characterized in that: The heat insulation filling layer (4) is a ceramic fiber filling layer.

7. A fireproof cable according to claim 3, characterized in that: The inner wall of the connecting groove (62) is arc-shaped, and several connecting grooves (62) are evenly distributed in an array along the circumference.

8. A fireproof cable according to claim 1, characterized in that: A fireproof layer (72) is provided between the outer wall of the inner sheath layer (7) and the insulating protective layer (6), and the fireproof layer (72) is fireproof cotton.

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