Fireproof flame-retardant cable

Abstract

The utility model discloses a fireproof flame-retardant cable, which relates to the technical field of cables, and comprises an armor layer and an isolation flame-retardant mechanism, the inner wall of the armor layer is provided with a braided protective layer, the inner wall of the braided protective layer is provided with a fireproof heat-insulating layer, the fireproof heat-insulating layer is internally provided with a plurality of cable cores, and the cable cores are arranged on the inner wall of the braided protective layer. The side wall of the wire core is wrapped with an insulating layer, a plurality of supporting frames are arranged in the fireproof heat-insulating layer, and gaps among the fireproof heat-insulating layer, the insulating layer and the supporting frames are filled with fireproof fillers. The wire cores are isolated and separated through the supporting frames, so that the condition of short circuit caused by contact among the wire cores is avoided; when flame burns through the insulating layer and the supporting frame, the flame can be extinguished through carbon dioxide of the carbon dioxide filling layer, after the wrapping layer is burnt through, the intumescent flame retardant begins to burn, and a carbonaceous foam layer is generated on the surface of the intumescent flame retardant, so that the wire cores are further mutually isolated and separated.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a fireproof and flame-retardant cable. Background Art

[0002] Cables are mainly used for control installation, connecting equipment, and transmitting electricity. They are common and indispensable in daily life. There are multiple wires inside the cable, and different wires are connected to connectors of different polarities. If different wires touch each other, a short circuit will be formed, which has very serious consequences.

[0003] Most existing cables only isolate the internal wires through an insulating layer. Once the insulating layer is broken, it is easy for the two wires to come into contact, causing a short circuit. In addition, when a single wire burns, the flame retardant effect is poor, which is inconvenient for users.

[0004] In view of the above problems, an improved fire-resistant and flame-retardant cable is now designed. Utility Model Content

[0005] The purpose of the utility model is to provide a fire-resistant and flame-retardant cable to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A fireproof and flame-retardant cable comprises an armor layer and an isolating and flame-retardant mechanism, a braided protective layer is installed on the inner wall of the armor layer, a fireproof and heat-insulating layer is installed on the inner wall of the braided protective layer, a plurality of wire cores are arranged inside the fireproof and heat-insulating layer, the side walls of the wire cores are wrapped with an insulating layer, a plurality of support frames for isolating and separating the wire cores are arranged inside the fireproof and heat-insulating layer, the support frames are connected to each other at their ends, and the gaps between the fireproof and heat-insulating layer, the insulating layer and the support frames are filled with fireproof fillers.

[0008] The isolation and flame retardant mechanism is arranged inside the support frame, and is used to isolate the wire cores one by one, avoid short circuit caused by connection between the wire cores, and flame retard the wire cores.

[0009] As a further solution of the utility model: the isolation and flame retardant mechanism includes a plurality of wrapping layers, the wrapping layers are arranged inside a support frame between two adjacent insulating layers, a plurality of connecting rods for supporting the wrapping layers are installed on the side walls of the wrapping layers, one end of the connecting rod away from the wrapping layers is installed on the inner wall of the support frame, the interior of the wrapping layer is filled with an expandable flame retardant, and the gap between the wrapping layer and the support frame is filled with a carbon dioxide filling layer.

[0010] As a further solution of the utility model: a waterproof shielding layer for waterproofing and electromagnetic shielding is arranged between the woven protective layer and the fireproof and heat-insulating layer.

[0011] As a further solution of the utility model: a reinforced steel core for improving the tensile strength of the cable is arranged inside the fireproof filler between the wire core and the support frame.

[0012] As a further solution of the utility model: the fireproof filler is a magnesium hydroxide filler.

[0013] As a further solution of the utility model: the fireproof and heat-insulating layer is made of fire-resistant mica.

[0014] As a further solution of the utility model: the braided protective layer is a glass fiber braided layer.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model isolates and separates the wire cores through a supporting frame to avoid contact between the wire cores and the occurrence of short circuits, thereby reducing the fire caused by short circuits. At the same time, when a single wire core is overheated and burns, when the flame burns through the insulating layer and the supporting frame, the flame can be extinguished by the carbon dioxide in the carbon dioxide filling layer. After the wrapping layer is burned through, the intumescent flame retardant starts to burn, and a carbon foam layer is generated on the surface of the intumescent flame retardant, thereby achieving heat insulation, oxygen isolation, and smoke suppression, and further isolating the wire cores from each other to avoid the occurrence of short circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the support frame in the utility model.

[0020] Among them: 1. Armor layer; 2. Braided protective layer; 3. Waterproof shielding layer; 4. Fireproof and heat-insulating layer; 5. Fireproof filler; 6. Carbon dioxide filling layer; 7. Wrapping layer; 8. Expandable flame retardant; 9. Reinforced steel core; 10. Wire core; 11. Insulation layer; 12. Connecting rod; 13. Support frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1-Figure 3 In an embodiment of the utility model, a fire-retardant cable comprises an armor layer 1 and an isolating flame-retardant mechanism, a braided protective layer 2 is installed on the inner wall of the armor layer 1, a fire-proof heat-insulating layer 4 is installed on the inner wall of the braided protective layer 2, a plurality of wire cores 10 are arranged inside the fire-proof heat-insulating layer 4, the side walls of the wire cores 10 are wrapped with an insulating layer 11, a plurality of support frames 13 for isolating the wire cores 10 are arranged inside the fire-proof heat-insulating layer 4, the support frames 13 are connected to each other, a fire-proof filler 5 is filled in the gap between the fire-proof heat-insulating layer 4, the insulating layer 11 and the support frame 13, a waterproof shielding layer 3 for waterproof and electromagnetic shielding is arranged between the braided protective layer 2 and the fire-proof heat-insulating layer 4, a reinforced steel core 9 for improving the tensile strength of the cable is arranged inside the fire-proof filler 5 between the wire cores 10 and the support frame 13, and the reinforced steel core 9 can also disperse the heat generated by the wire cores 10, and has a certain heat dissipation effect on the wire cores 10.

[0024] The isolation and flame retardant mechanism is arranged inside the support frame 13 , and is used to isolate the wire cores 10 one by one, avoid short circuits caused by connections between the wire cores 10 , and provide flame retardancy to the wire cores 10 .

[0025] The isolation and flame retardant mechanism includes a plurality of wrapping layers 7, which are arranged inside a support frame 13 between two adjacent insulating layers 11. A plurality of connecting rods 12 for supporting the wrapping layer 7 are installed on the side wall of the wrapping layer 7, and one end of the connecting rod 12 away from the wrapping layer 7 is installed on the inner wall of the support frame 13. The interior of the wrapping layer 7 is filled with an expandable flame retardant 8. When the expandable flame retardant 8 burns, a carbon foam layer is generated on the surface of the expandable flame retardant 8, which has the effects of heat insulation, oxygen isolation, smoke suppression, and drip prevention, and further isolates the wire cores 10 from each other. The gap between the wrapping layer 7 and the support frame 13 is filled with a carbon dioxide filling layer 6, which can extinguish fire when a fire occurs.

[0026] The working principle of a fire-retardant cable:

[0027] When the wire core 10 catches fire, the flame burns through the insulating layer 11 and the support frame 13. At this time, the carbon dioxide in the carbon dioxide filling layer 6 will extinguish the flame and retard it. When the flame continues to burn and burns through the wrapping layer 7, the flame burns the expandable flame retardant 8. A carbon foam layer will be generated on the surface of the expandable flame retardant 8, which has the effects of heat insulation, oxygen isolation, smoke suppression, and drip prevention, and further isolates the wire cores 10 from each other.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. A fireproof and flame-retardant cable, comprising an armor layer (1) and an isolating and flame-retardant structure, wherein a braided protective layer (2) is installed on the inner wall of the armor layer (1), a fireproof and heat-insulating layer (4) is installed on the inner wall of the braided protective layer (2), a plurality of wire cores (10) are arranged inside the fireproof and heat-insulating layer (4), and the side walls of the wire cores (10) are wrapped with an insulating layer (11), characterized in that: A plurality of support frames (13) for isolating and separating the wire cores (10) are arranged inside the fireproof and heat-insulating layer (4), the support frames (13) are connected to each other at their ends, and the gaps between the fireproof and heat-insulating layer (4), the insulating layer (11) and the support frames (13) are filled with fireproof fillers (5); The isolation and flame retardant mechanism is arranged inside the support frame (13) and is used to isolate the wire cores (10) one by one, avoid short circuits caused by connections between the wire cores (10), and provide flame retardancy to the wire cores (10).

2. A fire-resistant and flame-retardant cable according to claim 1, characterized in that: The isolation flame retardant mechanism comprises a plurality of wrapping layers (7), wherein the wrapping layers (7) are arranged inside a support frame (13) between two adjacent insulating layers (11), a plurality of connecting rods (12) for supporting the wrapping layers (7) are installed on the side walls of the wrapping layers (7), and one end of the connecting rod (12) away from the wrapping layers (7) is installed on the inner wall of the support frame (13), the interior of the wrapping layers (7) is filled with an intumescent flame retardant (8), and the gap between the wrapping layers (7) and the support frame (13) is filled with a carbon dioxide filling layer (6).

3. The fire-retardant cable according to claim 1, characterized in that: A waterproof shielding layer (3) for waterproofing and shielding electromagnetic waves is provided between the braided protective layer (2) and the fireproof and heat-insulating layer (4).

4. The fire-retardant cable according to claim 1, characterized in that: A reinforced steel core (9) for improving the tensile strength of the cable is arranged inside the fireproof filler (5) between the cable core (10) and the support frame (13).

5. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The fireproof filler (5) is a magnesium hydroxide filler.

6. The fire-resistant and flame-retardant cable according to claim 1, characterized in that: The fireproof and heat-insulating layer (4) is made of fire-resistant mica.

7. The fire-retardant cable according to claim 1, characterized in that: The braided protective layer (2) is a glass fiber braided layer.

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