Flame-retardant wear-resistant wire harness
By employing ceramicized silicone rubber insulation, basalt fiber braiding, and flame-retardant polyolefin outer sheath in the wire harness, the problems of flame retardancy, wear resistance, and pressure resistance in high-temperature, flammable, explosive, and high-friction environments are solved, thereby improving the stability and safety of power transmission.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-10
AI Technical Summary
Existing wire harnesses have poor flame retardant properties and poor wear resistance in high-temperature, flammable, explosive, and high-friction environments, which can easily cause fires and unstable power transmission. In addition, their compressive strength is insufficient, resulting in a shortened service life.
The inner core is wrapped with a ceramicized silicone rubber insulation layer, and the outer layer consists of a basalt fiber braided layer and a flame-retardant polyolefin outer sheath. It is equipped with an elastic hollow ring and a polyurethane block to enhance flame retardancy, wear resistance and pressure resistance. The fireproof and electromagnetic shielding effects are improved by an intumescent flame-retardant coating and a copper mesh braided layer.
It significantly improves the flame retardancy, wear resistance, and pressure resistance of wire harnesses, reduces fire risk, ensures the stability and safety of power transmission, extends service life, and reduces maintenance costs.
Smart Images
Figure CN224109995U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wire harness technology, specifically to a flame-retardant and wear-resistant wire harness. Background Technology
[0002] Wire harnesses are widely used in modern industry and electronic equipment for transmitting power and signals. Wire harnesses serve as the overall system of service equipment for a certain load source group, such as relay lines, switching devices, control systems, etc. Wire harnesses are made by arranging wires of different specifications and colors in a reasonable manner and bundling the wires together with insulating materials.
[0003] In today's industrial production, transportation, and special construction fields, wire harnesses, as key components for power transmission and signal conduction, are widely used in various complex environments. However, in some special locations, such as high-temperature workshops, inside equipment with frequent mechanical friction, and flammable and explosive environments, the performance defects of ordinary wire harnesses are becoming increasingly apparent. Ordinary wire harnesses mostly use conventional insulation materials and sheath structures, which have poor flame retardant properties. When exposed to high temperatures or fire sources, they are prone to combustion. Once the wire harness burns, it will not only cause power transmission interruption and damage to connected equipment, but may also ignite surrounding combustibles, causing fires and resulting in huge economic losses and casualties. In addition, the wear resistance of ordinary wire harnesses is not ideal. In high-friction environments, the outer layer of the wire harness is easily worn, resulting in exposed internal wires. Exposed wires not only increase the risk of short circuits, but may also cause sparks due to poor contact, further aggravating safety hazards. Moreover, the compressive strength of existing wire harnesses is also low. When subjected to external pressure, the shape of the wire harness is easily deformed, which will not only affect its appearance, but may also damage the internal structure, affecting the stability and reliability of power transmission, thereby reducing the service life of the wire harness. This shortened lifespan necessitates frequent replacement of the wiring harness, increasing maintenance costs and workload, and causing considerable inconvenience to users. Utility Model Content
[0004] The purpose of this utility model is to provide a flame-retardant and wear-resistant wire harness in order to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model employs the following technical solution: a flame-retardant and wear-resistant wire harness, comprising: an inner core, a wear-resistant layer, a basalt fiber braided layer, and a flame-retardant polyolefin outer sheath arranged sequentially from the inside out; the basalt fiber braided layer is co-extruded with the flame-retardant polyolefin outer sheath after being impregnated with a flame retardant agent; the inner core includes multiple wires and a ceramicized silicone rubber insulation layer wrapping the multiple wires; multiple elastic hollow rings are arranged in an array and fixedly installed on the outer periphery of the flame-retardant polyolefin outer sheath; the interior of each elastic hollow ring is filled with a flame-retardant solvent; and multiple polyurethane blocks are arranged in an array and fixedly installed on the outer periphery of each elastic hollow ring.
[0006] Further, an intumescent flame-retardant coating is arranged between the wear-resistant layer and the basalt fiber woven layer, and the intumescent flame-retardant coating is composed of a char former, a catalyst and a blowing agent.
[0007] Further, a double-layer isolation structure is arranged between the ceramicized silicone rubber insulation layer and the wear-resistant layer, the inner layer is a magnesium oxide film formed by a vapor deposition method and has a thickness of 20-30 microns, and the outer layer is a mica tape subjected to an impregnation treatment.
[0008] Further, an elastic pad is fixedly installed between the two sides of the inner wall of the elastic hollow ring, and a plurality of through openings are formed in the elastic pad.
[0009] Further, the wear-resistant layer comprises an aramid fiber woven layer, and the aramid fiber woven layer is tightly wrapped outside the ceramicized silicone rubber insulation layer.
[0010] Further, a flame-retardant sponge is arranged in the inner core, and the flame-retardant sponge is filled in the gaps between the plurality of wires.
[0011] Further, a first shielding layer is arranged between the basalt fiber woven layer and the flame-retardant polyolefin outer sheath, and the first shielding layer is a copper mesh woven layer.
[0012] Further, the flame-retardant polyolefin outer sheath is coated with polyvinyl chloride anticorrosive paint on the peripheral side.
[0013] The utility model discloses the following beneficial effects:
[0014] The utility model discloses a wire harness, which comprises an inner core, a ceramicized silicone rubber insulation layer, a wear-resistant layer, a basalt fiber woven layer, a flame-retardant polyolefin outer sheath, an elastic hollow ring, a polyurethane block and a polyvinyl chloride anticorrosive coating. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is the utility model three -dimensional structure diagram;
[0016] Figure 2 is the utility model Figure 1 three -dimensional structure cross section view;
[0017] Figure 3 is the utility modelFigure 1 Another perspective structural section view of the present application;
[0018] Figure 4 The present application Figure 1 The internal structure plane section of the double-layer isolation structure in the present application.
[0019] The figure mark: 1, the inner core;2, the wear-resistant layer;21, the intumescent flame-retardant coating;3, the basalt fiber braided layer;4, the flame-retated polyolefin outer sheath;5, the wire;6, the ceramicized silicone rubber insulation layer;7, the elastic hollow ring;8, the elastic pad;9, the polyurethane block;10, the double-layer isolation structure;11, the magnesium oxide film;12, the mica tape;13, the aramid fiber braided layer;14, the flame-retarded sponge;15, the first shielding layer. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.
[0021] As Figures 1-4 shown, an embodiment of the present application provides a flame-retardant wear-resistant pencil, which comprises, from inside to outside, an inner core 1, a wear-resistant layer 2, a basalt fiber braided layer 3 and a flame-retarded polyolefin outer sheath 4, wherein the basalt fiber braided layer 3 is co-extruded with the flame-retarded polyolefin outer sheath 4 after being treated by impregnation with a flame retardant.
[0022] The inner core 1 comprises a plurality of wires 5 and a ceramicized silicone rubber insulation layer 6 wrapping the plurality of wires 5.
[0023] The elastic hollow ring 7 is in an array distribution and is fixedly installed on the outer circumferential side of the flame-retarded polyolefin outer sheath 4, the inside of the elastic hollow ring 7 is filled with a flame-retardant solvent, and the outer circumferential side of the elastic hollow ring 7 is fixedly installed with a plurality of polyurethane blocks 9 in an array. The elastic hollow ring 7 increases the compression resistance of the pencil.
[0024] The inner core 1 is composed of multiple wires 5, which are wrapped by a layer of ceramicized silicone rubber insulation 6. This insulation layer maintains excellent insulation properties in high-temperature environments and forms a ceramic structure when exposed to flames or high temperatures. This structure provides excellent heat insulation and fireproofing, effectively preventing heat conduction to the internal wires 5, thereby protecting the wires 5 from high-temperature damage and ensuring the continuity and stability of power transmission. The wear-resistant layer 2 is located between the inner core 1 and the basalt fiber woven layer 3. Its main function is to provide additional wear-resistant protection for the wire harness. When the wire harness is in a high-friction environment, such as inside a machine with frequent mechanical friction, the wear-resistant layer 2 can withstand most of the friction, reducing the impact of external wear on the internal wires 5 and the ceramicized silicone rubber insulation 6. This effectively reduces the risk of short circuits or sparks caused by wire exposure due to external wear, thereby improving the safety and service life of the wire harness.
[0025] The basalt fiber woven layer 3 is one of the key structures of the wire harness. Basalt fibers themselves have high strength, high modulus, and good heat resistance. After weaving into layers, they not only further enhance the wear resistance of the wire harness but also improve its tensile strength and compression resistance. This ensures the stability and reliability of power transmission when the wire harness is subjected to external pressure. In addition, the basalt fiber woven layer 3 is treated with a fire retardant and co-extruded with the fire-retardant polyolefin outer sheath 4. This treatment allows the fire retardant to be evenly distributed in the basalt fiber woven layer 3. When exposed to fire or high-temperature environments, the fire retardant can quickly act to suppress flame spread and reduce the likelihood of wire harness combustion. The fire-retardant polyolefin outer sheath 4 itself also has good fire-retardant properties, further improving the overall fire-retardant effect of the wire harness and effectively preventing fires.
[0026] The arrangement of the elastic hollow rings 7 is another innovation of the wire harness. Multiple elastic hollow rings 7 are arrayed and fixedly installed on the outer periphery of the fire-retardant polyolefin outer sheath 4, with fire-retardant solvent filled inside. When the fire-retardant polyolefin outer sheath 4 is burned, the fire-retardant solvent is quickly released to form a fire-retardant protective layer, further suppressing flame propagation, gaining valuable time for fire extinguishing and rescue, and reducing the loss caused by fires. At the same time, the outer periphery of the elastic hollow rings 7 is arrayed and fixedly installed with multiple polyurethane blocks 9, which have good cushioning performance and wear resistance. They can effectively absorb external impact forces, reduce damage to the wire harness main body, further improve the compression resistance and wear resistance of the wire harness, and prolong the service life of the wire harness. This fire-retardant and wear-resistant wire harness can effectively ensure the stability and safety of power transmission and signal conduction in complex environments such as high temperature, high friction, flammable and explosive, reduce safety hazards caused by wire harness damage, reduce maintenance costs and workload, and meet the high-performance requirements of wire harnesses in industrial production, transportation, and special buildings.
[0027] As Figure 2 shown, in some embodiments, an intumescent flame-retardant coating 21 is provided between the wear-resistant layer 2 and the basalt fiber woven layer 3, which is composed of a char-forming agent, a catalyst, and a blowing agent.
[0028] The intumescent flame-retardant coating 21 can rapidly react chemically when exposed to high temperatures or flames, forming an expanded carbonaceous foam layer that plays a remarkable role in fire prevention and heat insulation. When the wire harness is in a high-temperature environment or subjected to flame impact, the blowing agent in the intumescent flame-retardant coating 21 first decomposes and releases gas, which causes the coating to rapidly expand in volume, forming a porous carbonaceous foam structure. This expanded foam layer not only has good heat insulation properties, effectively preventing heat conduction to the interior of the wire harness, protecting the wires 5 and ceramicized silicone rubber insulation layer 6 from high-temperature damage, but also forms a dense carbonized layer on the surface, which has good oxygen barrier properties, effectively preventing oxygen from contacting the internal materials of the wire harness, thereby inhibiting the combustion reaction. At the same time, the char-forming agent will be converted into stable carbon at high temperatures, further enhancing the structural stability of the expanded layer, allowing it to maintain heat and oxygen insulation effects for a long time. The catalyst accelerates the reaction rate of the blowing agent and the char-forming agent, ensuring that the intumescent flame-retardant coating 21 can quickly play a role in a short time, improving the self-preservation ability of the wire harness under extreme conditions such as fire.
[0029] As Figure 2 and Figure 4 shown, in some embodiments, a double-layer isolation structure 10 is provided between the ceramicized silicone rubber insulation layer 6 and the wear-resistant layer 2, with an inner layer of a magnesium oxide film 11 formed by vapor deposition, 20-30 μm thick, and an outer layer of a mica tape 12 treated by immersion.
[0030] The inner layer of the double-layer isolation structure 10 is a magnesium oxide film 11 formed by vapor deposition, with a thickness of 20-30 μm. The magnesium oxide film 11 has excellent high-temperature resistance and good insulation properties, maintaining stable physical and chemical properties in high-temperature environments. Its high melting point and low thermal conductivity characteristics effectively block the transfer of heat, protecting the wires 5 and ceramicized silicone rubber insulation layer 6 of the inner core 1 from direct impact of external high-temperature environments. The mica tape 12 itself has excellent insulation properties and high-temperature resistance, and after immersion treatment, its mechanical strength and heat resistance are further improved. The mica tape 12 can effectively prevent heat and flames from penetrating to the inner core 1, while still maintaining good insulation properties in high-temperature environments, preventing short circuits and other problems caused by a decrease in insulation properties due to high temperatures. The multi-layer structure of the mica tape 12 can also buffer external mechanical impact, protecting the internal magnesium oxide film 11 and wires 5 from damage.
[0031] As Figure 3 shown in some embodiments, the elastic pad 8 is fixedly installed between the two sides of the inner wall of the elastic hollow ring 7, and a plurality of through holes are formed on the elastic pad 8.
[0032] The elastic pad 8 is used to further increase the compression resistance of the wire harness, so as to prevent the wire harness from being severely deformed after being pressed hard and affecting use. The plurality of through holes are used to communicate the space in the elastic hollow ring 7, so as to facilitate the release of the flame-retardant solvent.
[0033] As Figure 2 shown in some embodiments, the wear-resistant layer 2 includes an aramid fiber woven layer 13 which is tightly wrapped outside the ceramicized silicone rubber insulation layer 6.
[0034] Aramid fiber is a high-performance synthetic fiber, and its molecular structure contains aromatic amide groups, which endows it with excellent mechanical properties and thermal stability. The aramid fiber woven layer 13 is tightly wrapped outside the ceramicized silicone rubber insulation layer 6, which can effectively resist external friction and mechanical impact. In a high-friction environment, such as the inside of a device with frequent mechanical friction, the aramid fiber woven layer 13 can withstand most of the friction, preventing external wear from directly affecting the ceramicized silicone rubber insulation layer 6 and the wires 5, thereby avoiding the problem of short circuit or spark caused by the exposure of the wires 5 due to external wear.
[0035] As Figure 2 shown in some embodiments, the inner core 1 is provided with a fire-retardant sponge 14 inside, and the fire-retardant sponge 14 is filled in the gap between the plurality of wires 5. The fire-retardant sponge 14 itself has excellent fireproof and heat insulation performance.
[0036] The fire-retardant sponge 14 filled in the gap between the wires can effectively reduce the relative displacement and vibration between the wires 5. In an environment with frequent mechanical friction or large vibration, this filling structure can significantly enhance the anti-vibration performance of the wire harness, prevent the wires 5 from being damaged due to mutual friction, and thus prolong the service life of the wire harness.
[0037] As Figure 2 shown in some embodiments, a first shielding layer 15 is arranged between the basalt fiber woven layer 3 and the flame-retardant polyolefin outer sheath 4, and the first shielding layer 15 is a copper mesh woven layer.
[0038] The copper mesh woven layer can effectively shield external electromagnetic interference and ensure the stability of the wire transmission signal.
[0039] As Figure 2 shown in some embodiments, the flame-retardant polyolefin outer sheath 4 is coated with polyvinyl chloride anticorrosive paint on the peripheral side.
[0040] The polyvinyl chloride anti-corrosion coating is a material with excellent chemical corrosion resistance, which can effectively resist the corrosion of acid, alkali, salt and other chemicals in the external environment. After applying this coating on the outer surface of the flame-retardant polyolefin outer sheath 4, a uniform and dense protective film is formed, which not only prevents water and chemicals from penetrating into the wire harness, but also effectively isolates the corrosive gases and liquids in the external environment, thereby prolonging the service life of the wire harness.
[0041] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A flame-retardant abrasion-resistant wire harness characterized by comprising: The utility model relates to a kind of flame-retardant cable, including: inner core (1), wear-resistant layer (2), basalt fiber woven layer (3) and flame-retardant polyolefin outer sheath (4) are sequentially arranged from inside to outside, the basalt fiber woven layer (3) is treated with flame retardant impregnation after with the flame-retardant polyolefin outer sheath (4) co-extrusion molding; The inner core (1) includes a plurality of conductors (5) and a ceramicized silicone rubber insulation layer (6) wrapping the plurality of conductors (5); A plurality of elastic hollow rings (7) are arrayed and fixedly installed on the outer periphery of the flame-retardant polyolefin outer sheath (4), the elastic hollow rings (7) are filled with a flame-retardant solvent, and the outer periphery of the elastic hollow rings (7) is arrayed and fixedly installed with a plurality of polyurethane blocks (9). An intumescent flame-retardant coating (21) is arranged between the wear-resistant layer (2) and the basalt fiber woven layer (3), and the intumescent flame-retardant coating (21) is composed of a char former, a catalyst and a blowing agent.
2. A flame resistant abrasion resistant wire harness according to claim 1, wherein, A double-layer isolation structure (10) is arranged between the ceramicized silicone rubber insulation layer (6) and the wear-resistant layer (2), the inner layer of the double-layer isolation structure (10) is a magnesium oxide film (11) formed by vapor deposition, and the thickness of the magnesium oxide film (11) is 20-30 μm, and the outer layer of the double-layer isolation structure (10) is a mica tape (12) treated by impregnation.
3. A flame resistant abrasion resistant wire harness according to claim 1, wherein, Elastic pads (8) are fixedly installed between the two sides of the inner wall of the elastic hollow rings (7), and a plurality of through openings are formed in the elastic pads (8).
4. A flame resistant abrasion resistant wire harness according to claim 1, wherein, The wear-resistant layer (2) includes an aramid fiber woven layer (13), and the aramid fiber woven layer (13) is tightly wrapped outside the ceramicized silicone rubber insulation layer (6).
5. A flame resistant abrasion resistant wire harness according to claim 1, wherein, A flame-retardant sponge (14) is arranged inside the inner core (1), and the flame-retardant sponge (14) is filled in the gap between the plurality of conductors (5).
6. A flame and abrasion resistant cord according to claim 1 wherein, A first shielding layer (15) is arranged between the basalt fiber woven layer (3) and the flame-retardant polyolefin outer sheath (4), and the first shielding layer (15) is a copper mesh woven layer.
7. A flame resistant abrasion resistant wire harness according to claim 1, wherein, Polyvinyl chloride anticorrosive paint is applied to the outer periphery of the flame-retardant polyolefin outer sheath (4).
8. A flame and abrasion resistant cord according to claim 1 wherein,