High-flame-retardant fireproof power cable

Abstract

The utility model provides a high flame-retardant fireproof power cable, which relates to the technical field of power cables and comprises a cable body, three wire cores are arranged in the cable body, and insulating layers are fixedly mounted on the outer walls of the three wire cores. According to the utility model, when a fire disaster occurs, the fireproof layer is made of a sheath material with flame retardant performance, such as flame retardant polyolefin, and the flame retardant polyolefin has higher flame retardant performance, so that the flame spreading speed can be slowed down. And when the flame is encountered, a flame retardant and an inerting agent can be generated, a stable carbonization layer is formed, and further diffusion of the fire behavior is prevented. The flame-retardant layer is made of a fireproof copper strip, the fireproof copper strip shows excellent fireproof performance in a high-temperature environment and can prevent flame from spreading and reduce the influence of a fire disaster on the cable, the filling layer is made of halogen-free flame-retardant polyolefin, and the material has excellent flame-retardant performance and fireproof performance; and flame spreading can be effectively slowed down, and smoke release can be blocked.

Description

Technical Field

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

[0002] With the development of society and the advancement of science and technology, many power plants, metallurgical and petroleum enterprises are developing towards large-scale groups. High-rise buildings, public entertainment venues, subways and underground streets are constantly emerging, and their electricity consumption is increasing day by day. Wires and cables can transmit and distribute electrical energy and transmit information, but they are also the "fuse" that can easily cause fires. Power cables are electrical equipment used to transmit electrical energy, usually composed of conductors, insulation layers, sheaths and fillers.

[0003] In the prior art, some power cables are installed in indoor environments such as high-rise buildings, public entertainment venues, subways and underground streets. The indoor environment may contain a lot of combustible materials. If the people indoors accidentally cause a fire, some traditional power cables may burn after coming into contact with the fire, thereby increasing the fire, making it more difficult for people to survive and reducing the efficiency of fire extinguishing. Utility Model Content

[0004] The utility model mainly provides a highly flame-retardant and fire-resistant power cable which is convenient for improving the fire resistance of the cable and preventing the cable from burning.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a highly flame-retardant and fire-resistant power cable, comprising: a cable body, three cores are arranged inside the cable body, the outer walls of the three cores are fixedly installed with insulating layers, the outer walls of the three insulating layers are fixedly installed with metal shielding layers, the outer walls of the three metal shielding layers are fixedly installed with flame-retardant layers, the outer walls of the three flame-retardant layers are fixedly installed with filling layers, the outer walls of the filling layers are fixedly installed with buffer layers, the outer walls of the buffer layers are fixedly installed with fireproof layers, and the outer walls of the fireproof layers are fixedly installed with outer protective layers.

[0006] Preferably, a plurality of evenly distributed anti-slip strips are fixedly mounted on the outer wall of the outer protective layer. The anti-slip strips can be used to increase the surface friction of the cable when the workers install and remove the cable, making it easier for the workers to hold the cable.

[0007] Preferably, the thickness of the insulating layer is 0.2 mm to 0.5 mm, and the insulating layer is made of polyethylene. Polyethylene is a polymer material with good insulation performance and mechanical strength. The polyethylene insulating layer has low cost and good processability and is easy to manufacture into various cable shapes and sizes.

[0008] Preferably, the thickness of the metal shielding layer is 0.1 to 0.4 mm, and the metal shielding layer is made of copper foil, which has high electrical conductivity and good fire resistance, can provide a reliable electromagnetic shielding effect, and has certain fire resistance characteristics in the event of a fire.

[0009] Preferably, the buffer layer has a thickness of 2 mm to 4 mm, and the buffer layer is made of calcium silicate. The calcium silicate material has a certain mechanical strength, can provide mechanical protection for the internal components of the cable, and reduce the impact of external forces on the cable.

[0010] Preferably, the thickness of the fireproof layer is 1mm to 3mm, and the material of the fireproof layer is a sheath material with flame retardant properties, such as flame retardant polyolefin. Flame retardant polyolefin has high flame retardant properties and can slow down the spread of flames. When encountering flames, it will generate flame retardants and inert agents to form a stable carbonized layer to prevent the further spread of the fire, and is environmentally friendly. Flame retardant polyolefin materials are usually halogen-free, and have lower smoke, toxic gases and environmental impact compared to halogen-containing flame retardant materials.

[0011] Preferably, the thickness of the outer sheath is 3 mm to 5 mm, and the outer sheath is made of a fire-resistant polymer. The fire-resistant polymer has certain mechanical strength and wear resistance, and can provide mechanical protection for the internal components of the cable to prevent external physical damage or shear force from affecting the cable.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, when a fire occurs, the material of the fireproof layer is a sheath material with flame retardant properties, such as flame retardant polyolefin. Flame retardant polyolefin has high flame retardant properties and can slow down the speed of flame spread. When encountering flames, it will generate flame retardants and inerting agents to form a stable carbonized layer to prevent the further spread of the fire. In addition, environmentally friendly flame retardant polyolefin materials are usually halogen-free. Compared with halogen-containing flame retardant materials, they have lower smoke, toxic gases and environmental impact. The material of the flame retardant layer is fireproof copper tape. The fireproof copper tape exhibits excellent fire resistance in high temperature environments, can prevent the spread of flames, and reduce the impact of fire on cables. The filling layer is made of halogen-free flame retardant polyolefin. This material has excellent flame retardant and fire resistance, and can effectively slow down the spread of flames and block smoke release.

[0014] 2. In the utility model, the buffer layer is made of calcium silicate, which has a certain mechanical strength and can provide mechanical protection for the internal components of the cable, reducing the impact of external forces on the cable. The outer sheath is made of a fire-resistant polymer, which has a certain mechanical strength and wear resistance, and can provide mechanical protection for the internal components of the cable, preventing the impact of external physical damage or shear force on the cable. The anti-slip strip can be used by workers to increase the friction on the cable surface when installing and disassembling the cable, making it easier for workers to hold the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model proposes an overall stereogram of a highly flame-retardant and fire-resistant power cable;

[0016] Figure 2 Another perspective stereogram of a highly flame-retardant and fire-resistant power cable is proposed for the utility model;

[0017] Figure 3 The utility model provides a cable body cross-sectional view of a highly flame-retardant and fire-resistant power cable.

[0018] Legend: 1. Cable body; 2. Outer sheath; 3. Fireproof layer; 4. Buffer layer; 5. Filling layer; 6. Anti-slip strip; 7. Wire core; 8. Insulation layer; 9. Metal shielding layer; 10. Flame retardant layer. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0021] See also Figure 1-Figure 3 The utility model provides a technical solution: a highly flame-retardant and fire-resistant power cable, comprising: a cable body 1, three cores 7 are arranged inside the cable body 1, the outer walls of the three cores 7 are fixedly installed with insulating layers 8, the outer walls of the three insulating layers 8 are fixedly installed with metal shielding layers 9, the outer walls of the three metal shielding layers 9 are fixedly installed with flame-retardant layers 10, the outer walls of the three flame-retardant layers 10 are fixedly installed with filling layers 5, the outer wall of the filling layer 5 is fixedly installed with a buffer layer 4, the outer wall of the buffer layer 4 is fixedly installed with a fireproof layer 3, and the outer wall of the fireproof layer 3 is fixedly installed with an outer sheath 2.

[0022] like Figure 2 and Figure 3As shown, a plurality of evenly distributed anti-slip strips 6 are fixedly installed on the outer wall of the outer sheath 2. The anti-slip strips 6 can be used to increase the surface friction of the cable when the workers install and remove the cable, making it easier for the workers to hold the cable.

[0023] like Figure 3 As shown, the thickness of the insulating layer 8 is 0.2 mm to 0.5 mm, and the insulating layer 8 is made of polyethylene. Polyethylene is a polymer material with good insulation performance and mechanical strength. The polyethylene insulating layer 8 has low cost and good processability and is easy to manufacture into various cable shapes and sizes.

[0024] like Figure 3 As shown, the thickness of the metal shielding layer 9 is 0.1 to 0.4 mm. The metal shielding layer 9 is made of copper foil. The copper foil has high electrical conductivity and good fire resistance, can provide a reliable electromagnetic shielding effect, and has certain fire resistance characteristics in the event of a fire.

[0025] like Figure 1-3 As shown, the buffer layer 4 has a thickness of 2 mm to 4 mm. The buffer layer 4 is made of calcium silicate. The calcium silicate material has a certain mechanical strength, can provide mechanical protection for the internal components of the cable, and reduce the impact of external forces on the cable.

[0026] like Figure 1-3 As shown, the thickness of the fireproof layer 3 is 1mm to 3mm, and the material of the fireproof layer 3 adopts a sheath material with flame retardant properties, such as flame retardant polyolefin. The flame retardant polyolefin has high flame retardant properties and can slow down the spread of flames. When encountering flames, it will generate flame retardants and inert agents to form a stable carbonized layer to prevent the further spread of the fire, and it is environmentally friendly. Flame retardant polyolefin materials are usually halogen-free, and compared with halogen-containing flame retardant materials, they have lower smoke, toxic gases and impact on the environment.

[0027] like Figure 1-3 As shown, the thickness of the outer sheath 2 is 3 mm to 5 mm. The outer sheath 2 is made of a fire-resistant polymer. The fire-resistant polymer has certain mechanical strength and wear resistance, and can provide mechanical protection for the internal components of the cable to prevent external physical damage or shear force from affecting the cable.

[0028] The use method and working principle of the device: When a fire occurs, the material of the fireproof layer 3 is a sheath material with flame retardant properties, such as flame retardant polyolefin. The flame retardant polyolefin has a high flame retardant property and can slow down the speed of flame spread. When encountering a flame, it will generate a flame retardant and an inert agent to form a stable carbonized layer to prevent the further spread of the fire, and it is environmentally friendly. Flame retardant polyolefin materials are usually halogen-free, and compared with halogen-containing flame retardant materials, they have lower smoke, toxic gases and environmental impact. The material of the flame retardant layer 10 is a fireproof copper belt, which exhibits excellent fire resistance under high temperature conditions, can prevent the spread of flames, and reduce the impact of fire on cables. The material of the filling layer 5 is halogen-free flame retardant polyolefin, which has excellent flame retardant and fire resistance, can effectively slow down the spread of flames and block smoke release. The buffer layer 4 is made of calcium silicate, which has a certain mechanical strength and can provide mechanical protection for the internal components of the cable and reduce the impact of external forces on the cable. The outer sheath 2 is made of a fire-resistant polymer, which has a certain mechanical strength and wear resistance, and can provide mechanical protection for the internal components of the cable to prevent external physical damage or shear force from affecting the cable. The anti-slip strip 6 can be used by workers to increase the friction on the cable surface when installing and removing the cable, making it easier for workers to hold the cable.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A highly flame retardant and fire resistant power cable, characterized in that: include: A cable body (1), wherein three wire cores (7) are arranged inside the cable body (1), the outer walls of the three wire cores (7) are all fixedly installed with insulating layers (8), the outer walls of the three insulating layers (8) are all fixedly installed with metal shielding layers (9), the outer walls of the three metal shielding layers (9) are all fixedly installed with flame retardant layers (10), the outer walls of the three flame retardant layers (10) are all fixedly installed with filling layers (5), the outer walls of the filling layers (5) are fixedly installed with buffer layers (4), the outer walls of the buffer layers (4) are fixedly installed with fireproof layers (3), and the outer walls of the fireproof layers (3) are fixedly installed with outer protective layers (2).

2. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: A plurality of evenly distributed anti-slip strips (6) are fixedly mounted on the outer wall of the outer protective layer (2).

3. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: The thickness of the insulating layer (8) is 0.2 mm to 0.5 mm.

4. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: The thickness of the metal shielding layer (9) is 0.1 to 0.4 mm.

5. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: The buffer layer 4 has a thickness of 2 mm to 4 mm.

6. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: The thickness of the fireproof layer (3) is 1 mm to 3 mm.

7. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: The thickness of the outer protective layer (2) is 3 mm to 5 mm.

Images