Wire harness with flame-retardant and heat-insulating functions

Abstract

The embodiment of the utility model provides a wire harness with flame-retardant and heat-insulating functions, and the wire harness comprises a flame-retardant outer sheath which is used for protecting internal components and providing a flame-retardant function; the heat insulation layer is positioned in the flame-retardant outer sheath and is used for preventing heat transfer; the internal wire is located in the heat insulation layer and used for transmitting electric signals or electric power; the flexible fixing piece is arranged between the heat insulation layer and the internal wire, and the heat insulation layer and the internal wire are fixed together in a winding or bonding mode; the shockproof sleeve is located between the flame-retardant outer sheath and the heat insulation layer; wherein the flexible fixing piece has elasticity, the heat insulation layer and the internal wire are fixed through a multi-strand spiral structure, and a layer of hot melt adhesive is formed at the fixing position of the flexible fixing piece, the heat insulation layer and the internal wire; and the shockproof sleeve is made of a plurality of sections of elastic materials, and an elastic ring is arranged between every two sections. According to the scheme of the embodiment of the invention, the problem of unstable insulation performance caused by local separation of the internal heat insulation layer when the wire harness is repeatedly bent and stretched can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, specifically to a wiring harness with flame-retardant and heat-insulating functions. BACKGROUND

[0002] The wiring harness with flame-retardant and heat-insulating functions combines flame-retardant and heat-insulating materials, which can effectively protect the electrical wires in high-temperature and fire environments and prolong their service life. However, there is a problem in the practical application of this wiring harness, that is, when the wiring harness is repeatedly bent and stretched, the internal heat-insulating layer may partially detach, which not only affects the structural stability of the wiring harness, but also may cause its insulation performance to become unstable, increasing the safety hazard. SUMMARY

[0003] Therefore, the present application provides a wiring harness with flame-retardant and heat-insulating functions to at least partially solve the problems in the prior art.

[0004] The wiring harness with flame-retardant and heat-insulating functions comprises:

[0005] a flame-retardant outer sheath for protecting internal components and providing flame-retardant functions;

[0006] a heat-insulating layer located inside the flame-retardant outer sheath for preventing heat transfer;

[0007] internal wires located inside the heat-insulating layer for transmitting electrical signals or power;

[0008] a flexible fixing member provided between the heat-insulating layer and the internal wires, which fixes the heat-insulating layer and the internal wires together by winding or adhesion;

[0009] a shockproof sleeve located between the flame-retardant outer sheath and the heat-insulating layer; wherein

[0010] the flexible fixing member has elasticity, fixes the heat-insulating layer and the internal wires through a multi-strand spiral structure, and forms a layer of hot melt adhesive at the fixed positions of the heat-insulating layer and the internal wires; and

[0011] the shockproof sleeve is made of multiple segments of elastic material, and an elastic ring is provided between each segment to enable the shockproof sleeve to provide shock absorption in multiple directions.

[0012] Preferably, the flame-retardant outer sheath comprises an outer layer of fluororesin material and an inner layer of rubber material.

[0013] Preferably, the heat-insulating layer is composed of multiple layers of heat-insulating plates arranged alternately, and an air gap is provided between each layer of heat-insulating plates.

[0014] Preferably, the thickness of the heat-insulating layer is unevenly distributed.

[0015] Preferably, the heat insulation layer is internally provided with a plurality of supporting ribs for maintaining the shape stability of the heat insulation layer.

[0016] Preferably, the internal wire is coated with a graphene protective layer on the surface.

[0017] Preferably, the outer surface of the shockproof sleeve is provided with anti-skid lines.

[0018] Preferably, the anti-skid lines are in a concave-convex structure.

[0019] The wire harness with flame-retardant and heat-insulating functions provided by the embodiments of the present disclosure comprises: a flame-retardant outer sheath for protecting internal components and providing flame-retardant functions; a heat insulation layer inside the flame-retardant outer sheath for preventing heat transfer; an internal wire inside the heat insulation layer for transmitting electrical signals or power; a flexible fixing member between the heat insulation layer and the internal wire for fixing the heat insulation layer and the internal wire together by winding or adhesion; and a shockproof sleeve between the flame-retardant outer sheath and the heat insulation layer; wherein the flexible fixing member is elastic, fixes the heat insulation layer and the internal wire through a plurality of spiral structures, and forms a layer of hot melt adhesive at the fixed positions of the heat insulation layer and the internal wire; and the shockproof sleeve is made of a plurality of elastic materials, and an elastic ring is arranged between each segment of the shockproof sleeve, so that the shockproof sleeve can provide shock absorption effect in multiple directions. Through the scheme of the embodiments of the present disclosure, the problem of unstable insulation performance caused by the local separation of the internal heat insulation layer of the wire harness during repeated bending and stretching can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the embodiments of the present disclosure, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 It is a schematic diagram of the wire harness shaft side structure of the present utility model;

[0022] Figure 2 It is a schematic diagram of the wire harness shaft side structure of the present utility model Figure 1 It is a schematic diagram of the heat insulation plate structure of the present utility model;

[0023] Figure 3 It is a schematic diagram of the wire harness shaft side structure of the present utility model Figure 1 It is a schematic diagram of the shockproof sleeve cross section of the present utility model.

[0024] In the figure: 1, flame-retardant outer sheath; 2, heat insulation layer; 3, internal wire; 4, flexible fixing member; 5, shockproof sleeve; 6, heat insulation plate; 7, graphene protective layer; 8, hot melt adhesive; 9, elastic ring; 10, anti-skid; 11, supporting rib DETAILED DESCRIPTION

[0025] To make the purposes, technical solutions and advantages of the embodiments of the present disclosure clearer, further specific embodiments and drawings are used to explain the embodiments of the present disclosure, which are only used to explain the embodiments of the present disclosure and not to limit the embodiments of the present disclosure.

[0026] As shown in Figure 1 , one kind of wire harness with flame-retardant and heat-insulating functions in the present application includes a flame-retardant outer sheath 1 for protecting internal components and providing flame-retardant functions; a heat-insulating layer 2 is located inside the flame-retardant outer sheath 1 and is made of high-temperature-resistant material for preventing heat transfer; internal wires 3 are located inside the heat-insulating layer 2 and are responsible for transmitting electrical signals or power; flexible fixing members 4 are arranged between the heat-insulating layer 2 and the internal wires 3 and tightly fix the heat-insulating layer 2 and the internal wires 3 together by winding or adhesion to prevent the heat-insulating layer 2 and the internal wires 3 from partially separating when repeatedly bending and stretching, thereby ensuring stable insulation performance; shockproof sleeves 5 are located between the flame-retardant outer sheath 1 and the heat-insulating layer 2 and are made of elastic material, which can reduce the influence on internal components when external vibration or impact occurs and simultaneously enhance the flexibility and durability of the whole.

[0027] The flame-retardant outer sheath 1 is a protective device covering the outermost layer of the wire harness and is usually made of polymer material with good flame-retardant performance, such as flame-retardant polyvinyl chloride or fluororubber. Its main function is to prevent flame propagation and damage to internal components by external environment. The heat-insulating layer 2 is made of high-temperature-resistant material, such as silicone rubber or mica tape, which has excellent high-temperature resistance and heat-insulating performance and can effectively block heat transfer in a high-temperature environment to protect the internal wires 3 from high-temperature influence. The internal wires 3 are composed of multiple copper core or aluminum core conductors and are wrapped with an insulating layer, usually made of high-insulation performance material such as polyethylene or cross-linked polyethylene. These wires are responsible for transmitting electrical energy or signals to ensure the stability and reliability of electrical connection.

[0028] The flexible fixing members 4 are designed to maintain good contact between the heat-insulating layer 2 and the internal wires 3 when repeatedly bending and stretching. They can be installed in multiple ways, with winding and adhesion being the two common methods. The winding method uses elastic materials such as fiber ropes or mesh fabrics to repeatedly wrap around the heat-insulating layer 2 and the internal wires 3, forming a spring-like effect that maintains close contact without causing wire damage due to excessive pressure. The adhesion method uses a special adhesive, such as silicone glue or epoxy resin, to form a firm bonding layer between the heat-insulating layer 2 and the internal wires 3. This design effectively prevents partial separation between the heat-insulating layer 2 and the wires, thereby ensuring stable insulation performance over a long period of use.

[0029] The shockproof sleeve 5 is a layer of elastic material between the flame-retardant outer sheath 1 and the thermal insulation layer 2, usually made of rubber or TPU (Thermoplastic Polyurethane) and other materials. Its main function is to provide cushioning when subjected to external shocks or impacts, reducing the impact of vibrations on internal components. The presence of the shockproof sleeve 5 also enhances the overall flexibility and durability of the wire harness, making it perform well in complex working environments. For example, when the wire harness is applied under the hood of a car or other high-vibration environments, the shockproof sleeve 5 can effectively absorb external impact forces, protecting the internal wires 3 from damage.

[0030] In summary, the design of this wire harness successfully solves the technical problem of unstable insulation performance caused by partial detachment of the internal thermal insulation layer 2 during repeated bending and stretching by introducing a multi-layer protection structure and special materials. The flame-retardant outer sheath 1 and the thermal insulation layer 2 provide double-layer protection for the wire harness, preventing high temperature and flame damage; the flexible fixing part 4 ensures stable contact between the internal wires 3 and the thermal insulation layer 2, reducing the risk of partial detachment; the shockproof sleeve 5 further improves the overall performance of the wire harness, enabling it to maintain reliable operation in various harsh conditions. This comprehensive design not only improves the safety and service life of the wire harness, but also expands its application range, meeting the needs of various high-demand application scenarios.

[0031] In one embodiment, the flame-retardant outer sheath 1 of a wire harness with flame-retardant and thermal insulation functions according to the present application is composed of two layers of different materials. The outer layer is made of high-weather-resistant fluororesin material, which has excellent chemical corrosion and ultraviolet resistance, ensuring that the wire harness maintains stable performance in external environments for a long time. The inner layer is made of rubber material with good elasticity, which can significantly improve the flexibility and wear resistance of the wire harness, effectively reducing the wear and tear of internal components during repeated bending and stretching, and prolonging the service life of the wire harness.

[0032] Specifically, the flame-retardant outer sheath 1 is realized by a double-layer composite process, first wrapping the rubber material with good elasticity as the inner layer uniformly around the outside of the wire harness, and then coating or adhering the high-weather-resistant fluororesin material on the outer layer. This double-layer structure not only improves the overall mechanical properties of the wire harness, but also endows the wire harness with excellent anti-aging ability and environmental adaptability. For example, coating, extrusion or adhesion processes can be used to tightly combine the two layers of materials, ensuring reliability under various use conditions.

[0033] In one embodiment, as shown in FIG. 1, the wire harness according to the present application comprises a flame-retardant outer sheath 1, a thermal insulation layer 2, a flexible fixing part 4, and a shockproof sleeve 5. Figure 2As shown, the thermal insulation layer 2 of the wire harness with flame-retardant and thermal insulation functions in this application is composed of multiple layers of thermal insulation plates 6 arranged alternately. The arrangement between these thermal insulation plates 6 ensures the existence of air gaps, which can significantly enhance the overall thermal insulation effect of the wire harness. The specific number of layers of thermal insulation plates 6 can be adjusted according to the actual application requirements to meet the thermal insulation needs under different environmental conditions. The air gaps set between each layer of thermal insulation plates 6 not only reduce the risk of heat conduction to the internal wires 3, but also improve the heat resistance and stability of the overall structure.

[0034] For example, in a specific implementation, the required air gaps can be formed by inserting sheet-like or mesh-like spacers between each layer of thermal insulation plates 6. Such spacer materials can be non-heat-conductive materials such as polytetrafluoroethylene (PTFE) or ceramic fibers, ensuring thermal insulation while improving the mechanical strength and durability of the entire thermal insulation layer 2. In addition, the thermal insulation plates 6 themselves can be made of materials with low thermal conductivity and high temperature resistance, such as silicate plates or mica plates, to further enhance thermal insulation performance. Under this structural design, the air gaps between the layers of thermal insulation plates 6 work together with the material itself to achieve effective thermal insulation protection.

[0035] In one embodiment, the thickness of the thermal insulation layer 2 of the wire harness with flame-retardant and thermal insulation functions in this application is unevenly distributed, and this design is adjusted based on the thermal load of different areas inside the wire harness to ensure that stronger thermal insulation performance is provided in areas with higher thermal load, while reducing the amount of thermal insulation material used in areas with lower thermal load, thereby effectively reducing the weight of the overall wire harness and reducing costs. The material of the thermal insulation layer 2 can be selected from materials with high temperature resistance and low thermal conductivity, such as mica, aluminum silicate fiber, or aerogel, etc. Through precise design and manufacturing process, the uneven distribution of thickness is achieved. Specifically, the thermal insulation layer 2 has a larger thickness near the high-temperature areas close to the engine or other high-temperature equipment, while it has a thinner thickness in the low-temperature areas away from these heat sources.

[0036] In one embodiment, this uneven thickness design can be achieved through various methods, such as by molding the thermal insulation material into a specific shape and thickness, and then wrapping it on the outer surface of the wire harness. Another implementation method is to use precise coating equipment in the automated production line to increase the thickness of the coating layer in areas where thermal insulation performance needs to be enhanced, while maintaining a thinner coating layer in other areas, in order to achieve the purpose of optimizing thermal insulation effect.

[0037] Referring back to Figure 1In one embodiment, the heat insulation layer 2 of the wire harness with flame-retardant and heat-insulating functions in the present application is internally provided with a plurality of support ribs 11 for maintaining the shape stability of the heat insulation layer 2. These support ribs 11, through special design, can reduce the deformation caused by the bending and stretching of the wire harness, thereby ensuring the long-term performance of the heat insulation layer 2. The main function of the heat insulation layer 2 is to insulate external heat sources and protect the internal wires 3 from heat damage, so its shape stability is crucial. The arrangement of the support ribs 11 not only enhances the overall strength of the heat insulation layer 2, but also improves its reliability and durability under various use conditions.

[0038] The support ribs 11 are uniformly distributed inside the heat insulation layer 2, usually arranged in an axial or annular direction to ensure uniform stress on the entire length of the heat insulation layer 2. For example, the support ribs 11 can be made of high-temperature-resistant materials such as glass fiber or carbon fiber to ensure their mechanical properties in high-temperature environments. The support ribs 11 can be directly injection molded inside the heat insulation layer 2 or embedded during the manufacturing process of the heat insulation layer 2. This structure allows the heat insulation layer 2 to maintain a stable geometric shape even under frequent bending and stretching, thereby ensuring the long-term effectiveness of its heat insulation and flame-retardant functions.

[0039] With reference to the foregoing description Figure 1 In one embodiment, the internal wires 3 of the wire harness with flame-retardant and heat-insulating functions in the present application are made of high-flexibility cable materials that inherently have high flexibility and bending resistance. To further enhance the performance of the internal wires 3, a graphene protective layer 7 is coated on their surface. The graphene protective layer 7 not only significantly improves the electrical conductivity and mechanical strength of the internal wires 3, but also effectively reduces the wire breakage caused by repeated bending and stretching, ensuring the stable operation of the wire harness under complex working conditions.

[0040] Specifically, the internal wires 3, as the key components of the wire harness, achieve the above technical features by uniformly coating a graphene protective layer 7 on their surface. The coating process usually uses solution immersion or spraying method to ensure that the graphene protective layer 7 completely covers the outer surface of the internal wires 3, forming a continuous and dense protective layer. The internal wires 3 treated in this way not only have improved electrical properties, but also have enhanced mechanical properties, which can better cope with stress changes in various working conditions. For example, in vehicle wiring or industrial equipment, the internal wires 3 can withstand frequent mechanical vibrations and temperature changes while maintaining good electrical properties and mechanical integrity.

[0041] In one embodiment, the flexible fixing member 4 of the wire harness with flame-retardant and thermal insulation functions in the present application is made of elastic fiber fabric. It fixes the thermal insulation layer 2 and the internal wires 3 through a multi-strand spiral structure, ensuring that there is no local detachment when repeatedly bending and stretching, while increasing the flexibility and service life of the fixing member. The main function of the flexible fixing member 4 is to provide sufficient flexibility while ensuring the overall stability of the wire harness structure to adapt to different usage requirements in different environments. Through its unique multi-strand spiral structure design, the fixing member can effectively and uniformly disperse external forces, preventing delamination caused by uneven local stress.

[0042] The connection between the flexible fixing member 4 and the thermal insulation layer 2 and the internal wires 3 is as follows: the thermal insulation layer 2 is tightly attached to the outer surface of the internal wires 3, while the flexible fixing member 4 is wrapped around the thermal insulation layer 2 and the internal wires 3, fixed by a multi-strand spiral winding, forming a tight integrated structure. This spiral winding design not only increases the contact area between the fixing member and the thermal insulation layer 2, but also maintains good fixing effect after multiple bending. Specifically, the flexible fixing member 4 is woven from several elastic fibers. These fibers form filament belts through a specific braiding process and are finally wrapped around the outside of the entire wire harness in the form of a multi-strand spiral, ensuring the stability and durability of the structure.

[0043] In one embodiment, in the wire harness with flame-retardant and thermal insulation functions in the present application, the flexible fixing member 4 is tightly fixed with the thermal insulation layer 2 and the internal wires 3 during installation using ultrasonic welding technology. This installation method not only improves the reliability and sealing of the fixing member, but also ensures the stability and long-term performance of the wire harness. Through ultrasonic welding, a layer of hot melt adhesive 8 is formed at the welding point, further enhancing the strength of the welding point, thereby making the connection between the flexible fixing member 4 and the thermal insulation layer 2 and the internal wires 3 more secure. The formation of this layer of hot melt adhesive 8 effectively prevents the problem of detachment caused by local stress.

[0044] Ultrasonic welding technology concentrates energy at the welding site through high-frequency vibration, causing the material at that point to melt rapidly, and then solidify to form a secure connection. For example, in the specific implementation process, first place the flexible fixing member 4 between the thermal insulation layer 2 and the internal wires 3, then use an ultrasonic welding device to operate on the connection between these components. The energy of the ultrasonic waves will cause the material at the contact surface of the flexible fixing member 4, the thermal insulation layer 2 and the internal wires 3 to melt rapidly, while releasing heat, thereby facilitating the formation of hot melt adhesive 8, ensuring high strength and high reliability of the connection.

[0045] In one embodiment, as Figure 3As shown, the shockproof sleeve 5 of the wire harness with flame-retardant and thermal insulation functions according to the present application is composed of multiple segments of elastic material. The connection between each segment is provided with an elastic ring 9, which ensures effective shock absorption in multiple directions. The presence of these elastic rings 9 not only reduces the impact of external vibrations or impacts on the internal components of the wire harness, but also maintains the flexibility of the wire harness as a whole, thereby meeting the usage requirements in different environments and conditions.

[0046] In the specific structural design of the shockproof sleeve 5, the multiple segments of elastic material are connected through elastic rings 9. Specifically, one end of each segment of elastic material is fixedly connected to one end of the adjacent segment through an elastic ring 9. These elastic rings 9 have high elasticity and toughness, and can deform when subjected to external forces and return to their original state after the external forces disappear. Therefore, when the wire harness encounters external vibrations or impacts, the shockproof sleeve 5 can absorb part of the energy through the deformation of the elastic rings 9, protecting the internal wire harness from damage. In addition, the multi-segment design also allows the shockproof sleeve 5 to flexibly adapt to various bending and twisting, ensuring the overall performance stability of the wire harness. For example, silicon rubber with high elasticity and temperature resistance can be selected as the elastic material, and high-strength and flexible nylon or polyurethane material can be used to manufacture the elastic rings 9 to meet the high standard requirements in actual applications.

[0047] In one embodiment, the wire harness with flame-retardant and thermal insulation functions according to the present application is characterized in that the outer surface of the shockproof sleeve 5 is provided with anti-slip lines 10, increasing the friction between the wire harness and the environment. Specifically, the anti-slip lines 10 effectively improve the stability and safety of the wire harness during installation and use by forming a series of regular or irregular concave-convex structures on the outer surface of the shockproof sleeve 5. This design not only prevents the wire harness from shifting due to external vibrations or impacts, but also enhances the adaptability of the wire harness in complex environments. In addition, the design of the anti-slip lines 10 can be adjusted according to the needs of actual application scenarios, such as different types of concave-convex shapes and distribution densities, to meet specific usage requirements.

[0048] For example, mold forming technology can be used during the production of the shockproof sleeve 5 to directly press the specific concave-convex pattern onto the outer surface of the shockproof sleeve 5. This process usually includes pre-setting the mold with the corresponding concave-convex pattern before material extrusion or injection molding, ensuring that the shockproof sleeve 5 can form the required anti-slip lines 10 during molding. In this way, the required anti-slip lines 10 can be efficiently and consistently formed on the shockproof sleeve 5, ensuring the overall performance of the wire harness.

[0049] In actual operation, when this device is used, the wire harness with fire-retardant and heat-insulating functions will maximize the performance and function of each component to ensure the overall safety and reliability of the wire harness. First, the fire-retardant outer sheath 1 plays the role of the first line of defense. Its material not only effectively resists physical damage from the outside, but also has excellent fire-retardant performance, effectively preventing the spread of flames even in high-temperature environments. Inside the fire-retardant outer sheath 1, the shockproof sleeve 5 further enhances the stability and flexibility of the wire harness. This layer of sleeve is made of elastic material, which can effectively absorb and buffer external vibrations and impacts, reducing the impact on internal components and prolonging the service life of the entire wire harness. The heat-insulating layer 2 is tightly attached to the inside of the shockproof sleeve 5 and is made of high-temperature-resistant material, with excellent heat-insulating effect, preventing external high temperatures from being transmitted to the inside and protecting the internal wires from heat damage. The flexible fixing member 4 located inside the heat-insulating layer 2 tightly fixes the heat-insulating layer 2 and the internal wires 3 together, ensuring that the heat-insulating layer 2 and the wires will not partially detach even under long-term repeated bending and stretching, thus guaranteeing the stable and reliable electrical insulation performance of the entire wire harness. Finally, the internal wires 3 transmit electrical signals or power under the protection of multiple layers, ensuring good performance in various harsh environments and meeting the complex application requirements.

[0050] The exemplary systems and methods of the present application have been specifically illustrated and described herein with the foregoing preferred modes of carrying out the systems and methods. Those skilled in the art will realize that various changes can be made to the embodiments of the systems and methods described herein without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A wire harness having a flame-retardant and heat-insulating function, characterized by comprising: The application relates to a flame-retardant cable, which comprises the following components: a flame-retardant outer sheath (1) for protecting internal components and providing a flame-retardant function; a heat insulation layer (2) located inside the flame-retardant outer sheath (1) for preventing heat transfer; internal wires (3) located inside the heat insulation layer (2) for transmitting telecommunication signals or power; flexible fixing members (4) arranged between the heat insulation layer (2) and the internal wires (3) for fixing the heat insulation layer (2) and the internal wires (3) together by winding or adhesion; a shockproof sleeve (5) located between the flame-retardant outer sheath (1) and the heat insulation layer (2); wherein the flexible fixing members (4) are elastic and fix the heat insulation layer (2) and the internal wires (3) through a multi-strand spiral structure, and a layer of hot melt adhesive (8) is formed at the fixing positions of the heat insulation layer (2) and the internal wires (3); and the shockproof sleeve (5) is made of multiple segments of elastic material, and elastic rings (9) are arranged between the segments so that the shockproof sleeve (5) can provide shock absorption effects in multiple directions.

2. The wire harness with fire-retardant and thermal insulation functions according to claim 1, characterized in that: The flame-retardant outer sheath (1) comprises an outer layer of fluororesin material and an inner layer of rubber material.

3. The wire harness with fire-retardant and thermal insulation functions according to claim 1, characterized in that: The heat insulation layer (2) is composed of multiple layers of heat insulation plates (6) arranged alternately, and air gaps are arranged between the heat insulation plates (6).

4. The wire harness with fire-retardant and thermal insulation functions according to claim 3, characterized in that: The thickness of the heat insulation layer (2) is unevenly distributed.

5. The wire harness with fire-retardant and thermal insulation functions according to claim 3, characterized in that: The heat insulation layer (2) is internally provided with a plurality of supporting ribs (11) for maintaining the shape stability of the heat insulation layer (2).

6. The wire harness with fire-retardant and thermal insulation functions according to claim 1, characterized in that: The surface of the internal wires (3) is coated with a graphene protective layer (7).

7. The wire harness with fire-retardant and thermal-insulating functions according to claim 1, characterized in that: The outer surface of the shockproof sleeve (5) is provided with anti-skid lines (10).

8. The wire harness with fire-retardant and thermal insulation functions according to claim 7, characterized in that: The anti-skid lines (10) are in a concave-convex structure.

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