Insulation fireproof cable

Abstract

The utility model relates to the technical field of cables, in particular to an insulating fireproof cable, which is sequentially provided with a protective jacket, a refractory material layer, an insulating material layer and a plurality of groups of cable cores arranged at the center from outside to inside, and a flame retardant filling layer is arranged in a hollow area among each group of cable cores. According to the utility model, through the arrangement of the protective outer sleeve, a preliminary protection effect on external physical damage can be achieved; the refractory material layer can keep the stability of the cable in a high-temperature environment and prevent fire from spreading; the toughness rib net filled in the insulating material layer enhances the flexibility and tensile property of the cable, plays an insulating role, and ensures the safety of electricity utilization; the flame retardant filling layer can effectively prevent flame from spreading, and the plurality of groups of reinforcing ribs which are uniformly and annularly arranged at equal intervals enhance the structural strength of the cable; the cable cores are the core conductive parts of the cable, and the flame retardant filling layers are arranged in the hollow areas among the plurality of groups of cable cores, so that the space is saved, and the fireproof performance can be enhanced.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to an insulated and fireproof cable. Background Technology

[0002] With the rapid development of modern technology, the performance requirements for cables, as important carriers of electricity and information transmission, are increasingly stringent. Especially in special environments, such as extreme conditions like high temperatures and fires, the insulation and fire resistance of cables become paramount. Many existing cables cannot effectively prevent the spread of fire, easily leading to rapid fire propagation and posing a significant threat to life and property. For example, the outer sheath and internal structure of some ordinary cables can burn rapidly at high temperatures, not only damaging themselves but also potentially igniting surrounding flammable materials, exacerbating the fire hazard. Furthermore, the insulation performance of some cables gradually declines with prolonged use or exposure to external environmental factors (such as humidity and high temperatures), potentially leading to safety accidents such as leakage and short circuits, affecting the normal operation of the power system, and even causing electrical fires. Utility Model Content

[0003] The purpose of this invention is to provide an insulated fireproof cable to solve the problem of limited fire resistance and insulation performance of existing cables mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The fire-resistant insulated cable consists of a protective jacket, a fire-resistant material layer, an insulating material layer, and several sets of cable cores installed at the center, arranged from the outside to the inside; a flame retardant filling layer is provided in the hollow area between each set of cable cores.

[0006] The insulating material layer is filled with a tough rib mesh, and several sets of uniformly spaced reinforcing ribs are arranged in a ring between the flame retardant filling layer and the insulating material layer.

[0007] Preferably, the protective jacket is made of PVC and has a thickness of 1-2 mm.

[0008] Preferably, the refractory material layer is a multi-layer mica tape wrapped refractory layer with a thickness of 1-2 mm.

[0009] Preferably, the insulating material layer is an XLPE cross-linked polyethylene insulating layer with a thickness of 0.5-1 mm.

[0010] Preferably, the flame retardant filling layer is a halogenated flame retardant filling layer or a nitrogen-based flame retardant filling layer, with a filling thickness of 2-3 mm.

[0011] Preferably, the cable core includes an inner core made of multiple strands of copper wire twisted together and an enameled layer disposed on the surface.

[0012] Preferably, the inner wall of the enameled layer is provided with several sets of uniformly spaced, ring-shaped buffer protrusions.

[0013] Preferably, the buffer protrusion is made of insulating rubber and the height of the protrusion is 0.3-1mm.

[0014] Compared with existing technologies, the beneficial effects of this utility model are:

[0015] In this fire-resistant insulated cable, the protective jacket provides initial protection against external physical damage; the fire-resistant material layer maintains the cable's stability at high temperatures, preventing the spread of fire; the flexible mesh filling within the insulation layer enhances the cable's flexibility and tensile strength while also providing insulation, ensuring electrical safety; the flame-retardant filling layer effectively prevents flame spread, and several sets of evenly spaced, ring-shaped reinforcing ribs further enhance the cable's structural strength; the cable core, the core conductive part, has a flame-retardant filling layer in the hollow areas between several sets of cores, saving space and enhancing fire resistance. These structures work together to give the cable excellent insulation, fire resistance, and mechanical properties, enabling it to operate safely and stably in various complex environments.

[0016] In this fire-resistant insulated cable, the cable core includes an inner core made of multiple strands of copper wire and an enameled layer on the surface. The inner wall of the enameled layer has several sets of evenly spaced, ring-shaped buffer protrusions. The inner core made of multiple strands of copper wire improves the conductivity and tensile strength of the cable; while the enameled layer effectively protects the inner core from external corrosion and wear.

[0017] In this fireproof insulated cable, the buffer protrusion is made of insulating rubber with a height of 0.3-1mm. This not only enhances the bonding force between the cable core and the insulation material layer, but also improves the buffer performance of the cable when subjected to external forces, effectively reducing the risk of damage to the cable core caused by thermal expansion and contraction. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are explained in detail together with the embodiments of the present invention, but do not constitute a limitation thereof.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the cable core of this utility model;

[0022] 10. Protective jacket;

[0023] 20. Refractory material layer;

[0024] 30. Insulation material layer; 31. Flexible reinforcing mesh;

[0025] 40. Flame retardant filler layer; 41. Reinforcing ribs;

[0026] 50. Cable core; 51. Inner core; 52. Enamel coating; 53. Buffer protrusion. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. 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.

[0028] In the description of this utility model, it should be understood that the terms "center", "vertical", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] An insulated fireproof cable, such as Figures 1-3As shown, from the outside to the inside, there are a protective jacket 10, a fire-resistant material layer 20, an insulating material layer 30, and several sets of cable cores 50 installed at the center; a flame retardant filling layer 40 is provided in the hollow area between each set of cable cores 50; the insulating material layer 30 is filled with a flexible rib mesh 31, and several sets of uniformly spaced reinforcing ribs 41 are arranged in a ring between the flame retardant filling layer 40 and the insulating material layer 30. Through the protective jacket 10, it can provide initial protection against external physical damage; the fire-resistant material layer 20 can withstand high temperature environments. The cable maintains stability in various environments, preventing the spread of fire. The flexible reinforcing mesh 31 within the insulation layer 30 enhances the cable's flexibility and tensile strength while also providing insulation, ensuring electrical safety. The flame retardant filling layer 40 effectively prevents flame spread, and its several groups of evenly spaced, ring-shaped reinforcing ribs 41 further strengthen the cable's structure. The cable core 50 is the core conductive part of the cable; the hollow areas between several groups of cable cores 50 are filled with flame retardant filling layers 40, saving space and enhancing fire resistance. These structures work together to give the cable excellent insulation, fire resistance, and mechanical properties, enabling it to operate safely and stably in various complex environments.

[0030] Furthermore, the protective jacket 10 is made of PVC with a thickness of 1-2mm, which gives the cable excellent wear resistance, corrosion resistance and waterproof performance, effectively protecting the internal cable structure from the influence of the external environment.

[0031] It is worth noting that the fire-resistant material layer 20 uses a multi-layer mica tape wrapped fire-resistant layer with a thickness of 1-2mm, which significantly improves the fire resistance of the cable in high-temperature environments and ensures that the cable can still work normally in extreme conditions such as fires.

[0032] Specifically, the insulation layer 30 uses XLPE cross-linked polyethylene insulation layer with a thickness of 0.5-1mm, which not only ensures the excellent insulation performance of the cable, but also has good mechanical strength and heat resistance, improving the reliability and service life of the cable.

[0033] Among them, the flame retardant filling layer 40 adopts a halogen-based flame retardant filling layer or a nitrogen-based flame retardant filling layer with a filling thickness of 2-3mm, which enhances the flame retardant performance of the cable, effectively prevents the spread of fire, and improves the safety of the cable.

[0034] In addition, the cable core 50 includes an inner core 51 made of multiple strands of copper wire and an enameled layer 52 on its surface. The inner wall of the enameled layer 52 is provided with several sets of evenly spaced, ring-shaped buffer protrusions 53. The inner core 51 made of multiple strands of copper wire improves the conductivity and tensile strength of the cable; while the enameled layer 52 effectively protects the inner core 51 from external corrosion and wear.

[0035] It is worth noting that the buffer protrusion 53 is made of insulating rubber and has a height of 0.3-1mm. This not only enhances the bonding force between the cable core 50 and the insulation material layer 30, but also improves the buffer performance of the cable when subjected to external forces, effectively reducing the risk of damage to the cable core 50 caused by thermal expansion and contraction.

[0036] Working principle of this insulated fireproof cable:

[0037] During use, if high temperatures are encountered, the 1-2mm thick multi-layer mica tape wrapped fire-resistant layer 20 will play a role in blocking heat from being conducted into the interior and protecting the internal structure of the cable; at the same time, the 0.5-1mm thick XLPE cross-linked polyethylene insulation material layer 30, with its good insulation performance, ensures safe current transmission, and the internal tough mesh 31 enhances the cable's flexibility and tensile strength, enabling it to adapt to different wiring scenarios.

[0038] When there is a fire source near the cable, the halogenated flame retardant filling layer or nitrogen-based flame retardant filling layer 40 with a thickness of 2-3mm will take effect to inhibit the spread of flame; the reinforcing ribs 41 can enhance the structural strength of the cable and prevent the cable from being damaged by the flame impact.

[0039] As the core conductive part, the cable core 50 has an inner core 51 made of multiple strands of copper wire to ensure good conductivity. The surface enamel layer 52 further insulates the cable, and the insulating rubber buffer protrusions 53 on the inner wall can buffer external forces, ensuring the stability and safety of the cable core during use.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An insulated fireproof cable, characterized in that: From the outside to the inside, there are a protective jacket (10), a fire-resistant material layer (20), an insulating material layer (30), and several sets of cable cores (50) installed at the center; a flame retardant filling layer (40) is provided in the hollow area between each set of cable cores (50); The insulating material layer (30) is filled with a tough rib mesh (31), and a number of uniformly spaced reinforcing ribs (41) are arranged in a ring between the flame retardant filling layer (40) and the insulating material layer (30).

2. The fire-resistant insulated cable according to claim 1, characterized in that: The protective jacket (10) is made of PVC and has a thickness of 1-2 mm.

3. The fire-resistant insulated cable according to claim 1, characterized in that: The refractory material layer (20) is a multi-layer mica tape wrapped refractory layer with a thickness of 1-2mm.

4. The fire-resistant insulated cable according to claim 1, characterized in that: The insulating material layer (30) is an XLPE cross-linked polyethylene insulating layer with a thickness of 0.5-1mm.

5. The fire-resistant insulated cable according to claim 1, characterized in that: The flame retardant filling layer (40) is a halogenated flame retardant filling layer or a nitrogen-based flame retardant filling layer, with a filling thickness of 2-3 mm.

6. The fire-resistant insulated cable according to claim 1, characterized in that: The cable core (50) includes an inner core (51) made of multiple strands of copper wire twisted together and an enameled layer (52) disposed on the surface.

7. The fire-resistant insulated cable according to claim 6, characterized in that: The inner wall of the enamel coating (52) is provided with several sets of uniformly spaced, ring-shaped buffer protrusions (53).

8. The fire-resistant insulated cable according to claim 7, characterized in that: The buffer protrusion (53) is made of insulating rubber and the height of the protrusion is 0.3-1mm.

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