Durable fireproof cable

Abstract

The utility model discloses a durable fireproof cable which comprises a composite outer sheath layer, a composite reinforcing layer is arranged in the composite outer sheath layer, a composite fireproof layer is arranged in the composite reinforcing layer, a composite insulating layer is arranged in the composite fireproof layer, a cable core is arranged in the composite insulating layer, and a cable core is arranged in the cable core. The cable core is composed of at least four groups of conductors, a central reinforcing member and a filler, the central reinforcing member is located at the central position of the cable core, the conductors and the central reinforcing member are twisted together, the filler is filled in gaps between the conductors and the central reinforcing member, and the filler is filled in the gaps between the conductors and the central reinforcing member. The problem that the performance of the internal fireproof layer is reduced due to the reduction of the protection performance of the outer sheath when the power cable is used for a long time at any time is solved.

Description

Technical Field

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

[0002] As an important part of the power system, power cables undertake the key task of transmitting and distributing electric energy. With the rapid development of modern society, the demand for electricity is growing, and the application of power cables in various fields is becoming more and more extensive. They are widely used in various fields such as industry, commerce, residence and public facilities to ensure the stability and reliability of power supply. Power cables are usually composed of conductors, insulation layers, sheath layers and other parts, and each part plays an indispensable role. The conductor is the core of the cable and is responsible for transmitting current; the insulation layer isolates the conductor from the external environment to ensure the safe transmission of current inside the cable; the sheath layer protects the cable from external physical damage and environmental erosion.

[0003] For example, the Chinese authorized patent "A fireproof cable structure" with announcement number CN215988177U includes a cable core, an insulating layer is arranged outside the cable core, a fireproof layer formed by filling with fireproof powder is arranged outside the insulating layer, an outer layer is arranged outside the fireproof layer, and a plurality of expansion members are arranged inside the fireproof layer. It has the effect of improving the protective effect of the fireproof layer filler on the cable outer layer.

[0004] Although the above-mentioned existing technology can achieve a certain fire prevention effect, the protective effect of the outer sheath of the power cable gradually decreases with long-term use, making the internal fireproof layer susceptible to the external environment and external forces, resulting in a decrease in fireproof performance. Therefore, it does not meet the existing needs. In this regard, we propose a durable fireproof cable. Utility Model Content

[0005] The utility model aims to provide a durable fireproof cable to solve the problem in the background art that the protective performance of the outer sheath of the power cable decreases over a long period of time, which leads to a decrease in the performance of the internal fireproof layer.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a durable fireproof cable, comprising a composite outer sheath layer, a composite reinforcement layer is arranged inside the composite outer sheath layer, a composite fireproof layer is arranged inside the composite reinforcement layer, a composite insulation layer is arranged inside the composite fireproof layer, a cable core is arranged inside the composite insulation layer, the cable core consists of a conductor, a central reinforcement member and a filler, at least four groups of conductors are arranged, the central reinforcement member is located at the center of the cable core, and the conductor and the central reinforcement member are twisted together to form a shape, and the filler is filled in the gap between the conductor and the central reinforcement member.

[0007] Preferably, the composite outer sheath layer comprises a protective outer layer and a protective inner layer, the protective outer layer is located on the outer wall of the protective inner layer, and the protective outer layer and the protective inner layer are co-extruded.

[0008] Preferably, the composite reinforcement layer includes a metal reinforcement layer and a non-metal reinforcement layer, the metal reinforcement layer is wrapped around the outside of the non-metal reinforcement layer, and the metal reinforcement layer has a mesh structure.

[0009] Preferably, the composite fireproof layer comprises an inorganic fireproof filler layer and a fireproof barrier layer, two inorganic fireproof filler layers are provided, and the fireproof barrier layer is located between the two inorganic fireproof filler layers.

[0010] Preferably, the composite insulating layer comprises a basic insulating layer and a reinforced insulating layer, wherein the basic insulating layer is wrapped around the outside of the reinforced insulating layer, and the basic insulating layer and the reinforced insulating layer are co-extruded.

[0011] Preferably, the conductor is formed by twisting a plurality of copper alloy monofilaments.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a composite outer sheath layer, which is composed of a protective outer layer and a protective inner layer. The protective outer layer is made of a special rubber material, and the protective inner layer is made of a ceramic polymer material. Under the action of the protective outer layer and the protective inner layer, the cable's physical wear resistance and tensile strength can be enhanced, so that the cable has a longer service life in harsh environments, can effectively prevent the spread of flames and reduce the burning speed, and provide additional safety protection for the cable in a fire.

[0014] 2. The utility model is provided with a composite reinforcement layer, which is composed of a metal reinforcement layer and a non-metal reinforcement layer. The metal reinforcement layer is made of copper alloy, and the non-metal reinforcement layer is made of aramid fiber. The combination of the metal reinforcement layer and the non-metal reinforcement layer makes the composite reinforcement layer have excellent tensile strength and compressive resistance, which can resist external pressure and physical damage, ensure the stability and safety of the cable, and the fine structure of the metal mesh layer can effectively prevent the wear of the outer sheath and extend the service life of the cable. At the same time, the non-metal reinforcement layer can also increase the overall wear resistance and improve the reliability of the cable in harsh environments. The non-metal reinforcement layer is made of high temperature resistant materials, which can maintain structural stability in high temperature environments and effectively prevent the spread of flames. At the same time, the metal mesh layer can also reflect heat, reduce the temperature of the cable surface, and further improve the fireproof performance.

[0015] 3. The utility model is provided with a composite fireproof layer, which is composed of an inorganic fireproof filler layer and a fireproof barrier layer. The inorganic fireproof filler layer is a mixed material of diatomaceous earth and expanded graphite, and the fireproof barrier layer is a fireproof mica tape. The inorganic fireproof filler and the fireproof barrier layer together constitute a solid fireproof barrier, which can effectively prevent the transfer of flames and heat, reduce the loss of cables in fires, and will not produce toxic gases during the combustion process, thereby ensuring the safety of personnel in fires. It is made of high temperature resistant, non-combustible special materials, has excellent mechanical strength, can resist external physical damage, and enhance the overall durability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the composite outer sheath layer of the utility model;

[0019] Figure 4 This is a schematic diagram of the composite reinforcement layer structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the composite fireproof layer structure of the utility model;

[0021] Figure 6 This is a schematic diagram of the composite insulation layer structure of the utility model.

[0022] In the figure: 1. composite outer sheath layer; 11. protective outer layer; 12. protective inner layer; 2. composite reinforcement layer; 21. metal reinforcement layer; 22. non-metal reinforcement layer; 3. composite fireproof layer; 31. inorganic fireproof filler layer; 32. fire barrier layer; 4. composite insulation layer; 41. basic insulation layer; 42. reinforced insulation layer; 5. cable core; 6. conductor; 7. center reinforcement; 8. filler. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-6The utility model provides an embodiment: a durable fireproof cable, comprising a composite outer sheath layer 1, a composite reinforcement layer 2 is arranged inside the composite outer sheath layer 1, a composite fireproof layer 3 is arranged inside the composite reinforcement layer 2, a composite insulation layer 4 is arranged inside the composite fireproof layer 3, a cable core 5 is arranged inside the composite insulation layer 4, the cable core 5 is composed of a conductor 6, a central reinforcement member 7 and a filler 8, the conductor 6 is arranged in at least four groups, the central reinforcement member 7 is located at the center of the cable core 5, and the conductor 6 and the central reinforcement member 7 are twisted together to form a filler 8 filled in the gap between the conductor 6 and the central reinforcement member 7, the filler 8 is polyolefin, and has good insulation The insulation performance and stability can maintain the roundness and stability of the cable core. The central reinforcement 7 is glass fiber reinforced plastic, which can provide excellent mechanical strength and tensile performance, enhance the durability and stability of the cable core. The compact structure and orderly arrangement of the cable core 5 make the installation and maintenance of the cable more convenient, reduce the installation cost and maintenance difficulty. The use of filler 8 can maintain the roundness and stability of the cable core, prevent the core from moving or deforming inside the cable, and ensure the stability and reliability of the cable structure. The central reinforcement 7 significantly improves the mechanical strength and tensile performance of the cable core, can resist external physical damage and tension, and enhances the durability and stability of the cable.

[0025] See also Figure 3 The composite outer sheath layer 1 includes a protective outer layer 11 and a protective inner layer 12. The protective outer layer 11 is located on the outer wall of the protective inner layer 12, and the protective outer layer 11 and the protective inner layer 12 are extruded together. The protective outer layer 11 is made of special rubber material, directly facing the external environment, and is responsible for resisting physical wear. The protective inner layer 12 is made of ceramic polymer material, which mainly has the function of preventing the spread of flames and reducing the burning speed. It can maintain structural integrity and prevent flame propagation at high temperatures.

[0026] See also Figure 4 The composite reinforcement layer 2 includes a metal reinforcement layer 21 and a non-metal reinforcement layer 22. The metal reinforcement layer 21 is wrapped on the outside of the non-metal reinforcement layer 22, and the metal reinforcement layer 21 has a mesh structure. The metal reinforcement layer 21 is made of copper alloy and is woven from fine metal wires to form a mesh structure, which is used to enhance the overall strength and tensile properties of the cable. It has good conductivity and mechanical properties and can effectively enhance the strength and wear resistance of the cable. The non-metal reinforcement layer 22 is made of aramid fiber and is used to provide additional mechanical support and fire protection.

[0027] See also Figure 5The composite fireproof layer 3 includes an inorganic fireproof filler layer 31 and a fireproof barrier layer 32. Two inorganic fireproof filler layers 31 are provided, and the fireproof barrier layer 32 is located between the two inorganic fireproof filler layers 31. The inorganic fireproof filler layer 31 is a mixed material of diatomaceous earth and expanded graphite, which is filled inside the fireproof layer to form a dense fireproof structure. It can expand at high temperature to form a dense fireproof layer, which effectively prevents the transfer of flames and heat. The fireproof barrier layer 32 is a fireproof mica tape, which forms a thin and tough fireproof barrier, effectively isolates the fire source, has excellent fireproof performance and mechanical strength, can maintain structural integrity in a fire, and effectively isolates the fire source.

[0028] See also Figure 6 The composite insulation layer 4 includes a basic insulation layer 41 and a reinforced insulation layer 42, and the basic insulation layer 41 is wrapped on the outside of the reinforced insulation layer 42, and the basic insulation layer 41 and the reinforced insulation layer 42 are extruded together. The basic insulation layer 41 is ethylene propylene rubber, which serves as the basis of cable insulation to ensure that the electrical performance of the cable is stable and reliable. The reinforced insulation layer 42 is polyimide, which increases the thickness and mechanical strength of the insulation layer, improves the voltage resistance and external force damage resistance of the cable, can optimize the electrical performance of the cable, improve the insulation strength and voltage resistance, ensure that the cable transmits power stably and reliably under normal working conditions, increase the thickness and mechanical strength of the insulation layer, improve the cable's ability to resist external force damage, and extend the service life of the cable.

[0029] See also Figure 1 and Figure 2 The conductor 6 is formed by twisting a plurality of copper alloy monofilaments, and has excellent electrical conductivity and mechanical properties, and can ensure efficient and stable transmission of current in the cable core.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A durable fireproof cable comprising a composite outer sheath layer (1), Features: The composite outer sheath layer (1) is provided with a composite reinforcement layer (2) inside, the composite reinforcement layer (2) is provided with a composite fireproof layer (3) inside, the composite fireproof layer (3) is provided with a composite insulation layer (4) inside, the composite insulation layer (4) is provided with a cable core (5) inside, the cable core (5) is composed of a conductor (6), a central reinforcement member (7) and a filler (8), at least four groups of conductors (6) are provided, the central reinforcement member (7) is located at the center of the cable core (5), the conductor (6) and the central reinforcement member (7) are twisted together to form, and the filler (8) is filled in the gap between the conductor (6) and the central reinforcement member (7); the composite outer sheath layer (1) comprises a protective outer layer (11) and a protective inner layer (12), the protective outer layer (11) is located on the outer wall of the protective inner layer (12), and the protective outer layer (11) and the protective inner layer (12) are extruded together.

2. A durable fireproof cable according to claim 1, Features: The composite reinforcement layer (2) comprises a metal reinforcement layer (21) and a non-metal reinforcement layer (22); the metal reinforcement layer (21) is wrapped around the outside of the non-metal reinforcement layer (22), and the metal reinforcement layer (21) is in a mesh structure.

3. A durable fireproof cable according to claim 1, Features: The composite fireproof layer (3) comprises an inorganic fireproof filler layer (31) and a fireproof barrier layer (32), two inorganic fireproof filler layers (31) are provided, and the fireproof barrier layer (32) is located between the two inorganic fireproof filler layers (31).

4. A durable fireproof cable according to claim 1, Features: The composite insulating layer (4) comprises a basic insulating layer (41) and a reinforced insulating layer (42), wherein the basic insulating layer (41) is wrapped around the outside of the reinforced insulating layer (42), and the basic insulating layer (41) and the reinforced insulating layer (42) are co-extruded.

5. A durable fireproof cable according to claim 1, Features: The conductor (6) is formed by twisting a plurality of copper alloy monofilaments.

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