Fireproof cable
By combining multi-layered structural design with specific materials, the problem of fire-resistant cables being prone to breakage when bent has been solved, resulting in cables with high strength and high fire resistance, thus improving cable safety and service life.
Patent Information
- Application Number
- CN202422532315.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-10-21
AI Technical Summary
Existing fire-resistant cables are too flexible during use and cannot effectively protect the cable core. They are prone to breakage due to bending, posing a safety hazard.
The cable adopts a multi-layer structure design, including an insulation layer, a flame-retardant layer, an internal fixed frame, an isolation layer, a support component, a heat insulation layer, a halogen-free low-smoke layer, and a fireproof layer. It utilizes ceramicized materials and expandable graphite materials to improve the cable's strength and fire resistance.
It enhances the cable's tensile strength and fire resistance, improves its toughness and insulation performance, reduces smoke and toxic gas emissions during fires, and enhances the cable's safety and lifespan.
Smart Images
Figure CN223598437U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wire and cable technical field especially relates to a fireproof cable. BACKGROUND
[0002] Cable is a kind of electric energy or signal transmission device, by one or more mutually insulated conductors and outer package insulation protection layer are made, electric power or information is transmitted from one place to another place's wire, in recent years, in order to improve the safety level of electrical line, reduce the occurrence and loss of electrical fire accident, ministry of construction, ministry of public security and some local government successively introduce some electrical design specification, and clearly stipulate that in some important electrical line and place must use fireproof cable, to further broaden the application range of fireproof cable.
[0003] In the prior art, the fireproof cable is usually coated with fireproof paint on the surface of the cable to improve the fireproof ability of the cable, but the existing fireproof cable body is relatively soft, cannot effectively protect the cable core, is easy to cause the cable core to break due to bending, has a great safety hazard, and is difficult to meet the actual use requirement. UTILITY MODEL CONTENTS
[0004] The utility model mainly provides a kind of fireproof cable with higher tensile strength and stronger fireproof ability.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a fireproof cable, comprising: three cable cores, an insulating layer is arranged on the outer side of the cable core, a flame-retardant layer is arranged on the outer side of the insulating layer, a fiber belt is wound on the outer side of the flame-retardant layer, an inner fixed framework is arranged between the three flame-retardant layers, an isolation layer is connected to the end portion of the inner fixed framework, and the three cable cores are arranged on the inner side of the isolation layer.
[0006] Preferably, the outer side of the isolation layer is provided with a support assembly, the outer side of the support assembly is provided with a heat insulation layer, the outer side of the heat insulation layer is provided with a halogen-free low-smoke layer, and the outer side of the halogen-free low-smoke layer is provided with a fireproof layer. The support assembly can strengthen the overall strength of the cable and improve the toughness of the cable. The heat insulation layer is mainly made of ceramicized silicone rubber material, which has good flexibility and elasticity at room temperature, good adhesion to the cable, and can be quickly ceramicized after burning to form a hard ceramic shell with excellent heat insulation performance. It can effectively block the transfer of heat to the inside of the cable, and also has good insulation performance to ensure the electrical safety of the cable in case of fire. The halogen-free low-smoke layer is mainly made of polyolefin material. Halogen-free flame-retardant polyolefin has good flame-retardant performance. By adding appropriate flame retardants, it can self-extinguish in case of fire to prevent the spread of fire, and its low-smoke property is remarkable, producing less smoke during combustion, greatly improving the visibility of the fire scene, and facilitating personnel evacuation and fire rescue. The fireproof layer is mainly made of expandable graphite material. Expandable graphite can expand rapidly when heated, with a volume expansion of hundreds or even thousands of times, forming a fluffy graphite carbon layer. This expanded carbon layer has good heat insulation performance and can effectively block the transfer of flame and heat. In addition, expandable graphite also has the advantages of halogen-free, non-toxic, corrosion-resistant, etc., which can effectively improve the fireproof performance of the cable and improve the safety in use, effectively prolonging its service life.
[0007] Preferably, the support assembly includes three outer support skeletons, one end of the outer support skeleton is connected with the heat insulation layer, and a filling layer is arranged between every two outer support skeletons. The outer support skeleton is mainly made of ceramicized polyolefin material, which has good flexibility and processability at room temperature, facilitating the production and manufacturing of the cable. It can quickly ceramicize when on fire to form a hard support structure, maintain the shape of the cable, prevent the cable from collapsing in a fire, ensure the relative position of the internal conductor is stable, has good insulation performance and flame retardant performance, effectively preventing the spread of fire and current leakage. The filling layer is mainly made of glass fiber cotton material, which has excellent high-temperature resistance and can remain stable at high temperatures without burning or supporting combustion. It has good heat insulation performance and can effectively block the transfer of heat to the inside of the cable. The fiber structure makes it have a certain flexibility, facilitating filling and installation, and the cost is relatively low.
[0008] Preferably, the outer side of the fireproof layer is provided with an outer sheath, and the outer side of the outer sheath is provided with anti-slip lines. The outer sheath is mainly made of nylon composite sheath, which combines the flame-retardant performance of polyolefin and the high strength and wear resistance of nylon, providing double protection. The low-smoke halogen-free property meets environmental protection requirements, reduces smoke and toxic gas emissions during a fire, has good water resistance and oil resistance, and is suitable for various complex environments. The anti-slip lines can increase the friction, thereby ensuring the stability of the cable during installation.
[0009] Preferably, the inner side of the isolation layer is filled with mica, which can enhance the fireproof performance of the cable, improve the insulation performance, and enhance the mechanical stability.
[0010] Preferably, the inner wall of the filling layer is attached to the isolation layer, and the outer wall of the filling layer is attached to the heat insulation layer, so that the connection between the layers of the cable is more closely connected, thereby improving the overall strength of the cable.
[0011] Compared with the prior art, the utility model has the advantages and positive effects that,
[0012] 1、The utility model discloses an insulation layer can enhance the insulation performance and fireproof ability of cable core, which mainly adopts cross -linked polyethylene material, has good electrical insulation performance and heat resistance, can be stable operation for a long time under higher temperature, and mechanical strength is high, wear -resisting, extrusion -resistant, the phenomenon of explosion of cable can be effectively prevented through the fire -retardant layer, and the safety is improved, which mainly adopts magnesium hydroxide material, has good fire -retardant performance, and when heated, the decomposition heat absorption reduces the temperature around, and the water vapor released simultaneously can dilute the concentration of combustible gas and oxygen, plays the role of fire -retardant, and the inner fixed framework can improve the strength and toughness of the cable as a whole, prevents the cable core from breaking and damaging due to bending, and can satisfy actual use demand.
[0013] 2、The utility model discloses a support assembly can strengthen the strength of the cable as a whole, and improve the toughness of the cable, and the heat insulation layer mainly adopts ceramic silicon rubber material, has good flexibility and elasticity under normal temperature, and will form hard ceramic shell after burning and meet the fire, has excellent heat insulation performance, and also has good insulation performance, ensures the electrical safety of the cable under the fire condition, and the halogen -free low -smoke layer mainly adopts polyolefin material, and the halogen -free fire -retardant polyolefin has good fire -retardant performance, and its low smoke characteristic is remarkable, and the smoke produced when burning is less, greatly improves the visibility of the fire scene, is favorable to personnel evacuation and fire rescue, and the fireproof layer mainly adopts expandable graphite material, and the expandable graphite can expand rapidly when heated, and this carbon layer after expansion has good heat insulation performance, and simultaneously, the expandable graphite also has the advantages of halogen -free, non -toxic and corrosion -resistant, so that the fireproof performance of the cable can be effectively improved, the use safety is improved, and the service life is effectively prolonged. ACCURACY
[0014] Figure 1 A perspective view of a fireproof cable is provided for the utility model;
[0015] Figure 2 A side view of a fireproof cable is provided for the utility model;
[0016] Figure 3 A partial structure schematic view of a fireproof cable is provided for the utility model;
[0017] Figure 4 The utility model provides a partial structure section view of fireproof cable.
[0018] Legend: 1, cable core; 2, insulating layer; 3, flame-retardant layer; 4, fiber belt; 5, inner fixed framework; 6, isolation layer; 7, outer supporting framework; 8, filling layer; 9, heat insulation layer; 10, halogen-free low-smoke layer; 11, fireproof layer; 12, outer sheath; 13, anti-skid lines. 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 combination with the drawings and examples.It should be noted that the examples and features in the examples of the present application can be combined with each other without conflict.
[0020] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from the description herein, therefore, the utility model is not limited to the specific examples disclosed in the following description.
[0021] Please refer to Figures 1-4 The utility model provides a technical scheme: a fireproof cable, including three cable cores 1, the outside of cable core 1 is provided with insulating layer 2, the outside of insulating layer 2 is provided with flame-retardant layer 3, the outside of flame-retardant layer 3 is wound with fiber belt 4, three flame-retardant layers 3 are provided with inner fixed framework 5, the end of inner fixed framework 5 is connected with isolation layer 6, three cable cores 1 are all provided in the inside of isolation layer 6, the insulating property and fireproof ability of cable core 1 can be enhanced through insulating layer 2, it mainly adopts crosslinked polyethylene material, has good electrical insulation and heat resistance, can be long-term stable operation under higher temperature, and mechanical strength is high, wear resistance, resistance to extrusion, the flame-retardant layer can effectively prevent the explosion phenomenon of cable, improves security, it mainly adopts magnesium hydroxide material, has good flame-retardant property, decomposes heat absorption when heating, reduces the temperature around, and the water vapor released simultaneously can dilute the concentration of combustible gas and oxygen, plays the role of flame-retardant, through inner fixed framework 5, the strength and tenacity of cable whole can be improved, prevent cable core 1 from breaking and damaging due to bending, can satisfy actual use demand.
[0022] As Figures 1-4As shown, the outer side of the isolation layer 6 is provided with a support assembly, the outer side of the support assembly is provided with a heat insulation layer 9, the outer side of the heat insulation layer 9 is provided with a halogen-free low-smoke layer 10, the outer side of the halogen-free low-smoke layer 10 is provided with a fireproof layer 11. The support assembly can strengthen the overall strength of the cable and improve the toughness of the cable. The heat insulation layer 9 is mainly made of ceramicized silicone rubber material, which has good flexibility and elasticity at room temperature, good adhesion to the cable, and can quickly ceramicize after burning to form a hard ceramic shell with excellent heat insulation performance, effectively blocking heat transfer to the inside of the cable, and also has good insulation performance to ensure the electrical safety of the cable in case of fire. The halogen-free low-smoke layer 10 is mainly made of polyolefin material. Halogen-free flame-retardant polyolefin has good flame-retardant performance and can self-extinguish in case of fire to prevent the spread of fire. It also has a low smoke feature, producing less smoke when burning, greatly improving the visibility of the fire scene, and facilitating personnel evacuation and fire rescue. The fireproof layer 11 is mainly made of expandable graphite material. Expandable graphite can expand rapidly when heated, with a volume expansion of hundreds or even thousands of times, forming a fluffy graphite carbon layer. This expanded carbon layer has good heat insulation performance, effectively blocking the transfer of flame and heat. In addition, expandable graphite is halogen-free, non-toxic, and corrosion-resistant, which can effectively improve the fireproof performance of the cable, improve the safety in use, and effectively prolong the service life.
[0023] As shown in Figures 1-4 , the support assembly includes three outer support skeletons 7, one end of each outer support skeleton 7 is connected to the heat insulation layer 9, and a filler layer 8 is arranged between every two outer support skeletons 7. The outer support skeleton 7 is mainly made of ceramicized polyolefin material, which has good flexibility and processability at room temperature, facilitating the production and manufacturing of the cable. It can quickly ceramicize when exposed to fire, forming a hard support structure that maintains the shape of the cable, prevents the cable from collapsing in a fire, ensures the relative position of the internal conductor is stable, has good insulation performance and flame retardant performance, effectively prevents the spread of fire and current leakage. The filler layer 8 is mainly made of glass fiber cotton material, which has excellent high-temperature resistance and remains stable at high temperatures without burning or supporting combustion. It has good heat insulation performance, effectively blocking heat transfer to the inside of the cable, and has a certain flexibility due to its fiber structure, making it easy to fill and install, and the cost is relatively low.
[0024] As shown in Figure 1 , Figure 2 and Figure 4As shown, the outer side of the fireproof layer 11 is provided with an outer sheath 12, and the outer side of the outer sheath 12 is provided with anti-skid lines 13. The outer sheath 12 is mainly made of nylon composite sheath, which combines the flame-retardant performance of polyolefin and the high strength and wear resistance of nylon, provides double protection, and meets the environmental protection requirements of low smoke and halogen-free characteristics, reduces smoke and toxic gas emissions during fire, has good water resistance and oil resistance, and is suitable for various complex environments. The anti-skid lines 13 can increase the friction, thereby ensuring the stability of the cable during installation and use.
[0025] As shown in Figure 3 and Figure 4 The inner side of the isolation layer 6 is filled with mica, which can enhance the fireproof performance of the cable, improve the insulation performance, and enhance the mechanical stability.
[0026] As shown in Figures 1-4 The inner wall of the filling layer 8 is attached to the isolation layer 6, and the outer wall of the filling layer 8 is attached to the heat insulation layer 9. The filling layer 8 can make the connection between the various layers of the cable more closely, thereby improving the overall strength of the cable.
[0027] The use method and working principle of the device are as follows: first, the cooperation of the inner fixed framework 5, the outer supporting framework 7 and the filling layer 8 improves the overall strength and toughness of the cable, so that the cable core 1 is not easy to break and damage when bending; then, the heat insulation layer 9, the halogen-free low-smoke layer 10 and the fireproof layer 11 enhance the overall fireproof performance of the cable, so that the cable is not easy to explode, and the safety during use is higher; finally, the outer sheath 12 protects the cable from the outside, prolongs the service life of the cable, and the anti-skid lines 13 increase the friction to ensure the stability of the cable during installation and use, thereby completing the use of the fireproof cable.
[0028] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present application still falls within the protection scope of the present application.
Claims
1. A fire resistant cable, characterised in that, The utility model relates to a kind of cable structures, including: Three cable cores (1), the outer side of the cable core (1) is provided with insulation layer (2), the outer side of the insulation layer (2) is provided with flame-retardant layer (3), the outer side of the flame-retardant layer (3) is wound fiber band (4), inner fixed skeleton (5) is arranged between three the flame-retardant layer (3), the end of the inner fixed skeleton (5) is connected with isolation layer (6), three the cable core (1) is arranged in the inner side of isolation layer (6).
2. The fire resistant cable of claim 1, wherein: The outer side of the isolation layer (6) is provided with support assembly, the outer side of the support assembly is provided with heat insulation layer (9), the outer side of the heat insulation layer (9) is provided with halogen-free low smoke layer (10), the outer side of the halogen-free low smoke layer (10) is provided with fireproof layer (11).
3. The fire resistant cable of claim 2, wherein: The support assembly includes three outer support skeletons (7), one end of the outer support skeleton (7) is connected with heat insulation layer (9), and filling layer (8) is arranged between every two outer support skeletons (7).
4. The fire resistant cable of claim 2, wherein: The outer side of the fireproof layer (11) is provided with outer sheath (12), the outer side of the outer sheath (12) is provided with anti-skid line (13).
5. The fire resistant cable of claim 1, wherein: The inner side of the isolation layer (6) is filled with mica.
6. The fire resistant cable of claim 3, wherein: The inner wall of the filling layer (8) is attached to the isolation layer (6), and the outer wall of the filling layer (8) is attached to the heat insulation layer (9).