Flexible fire resistant robot cable

Abstract

The utility model provides a kind of flexible fireproof robot cable, it is realized the high softness and good bending recovery ability when cable is under pressure or bending by the cooperation of arc flexible member and M-shaped flexible connecting piece;Partition and the cavity structure optimization cable layout of end portion fixed flame-retardant filling layer, ensure that flame-retardant performance is uniform and cable overall fireproof reliable;The cooperation of flame-retardant filling layer, inner halogen-free low-smoke flame-retardant layer, outer halogen-free low-smoke flame-retardant layer and heat insulation layer makes cable long-term keep flame-retardant effect and reduce harmful smoke release under high temperature or flame environment;The setting of inner shielding layer and outer shielding layer enhances anti-electromagnetic interference ability, guarantees signal transmission stable;The wear resistance layer of outermost layer improves wear resistance, so that cable adapts complex motion environment and prolongs service life.Therefore, the flexible fireproof robot cable is excellent in flexibility, fireproof, wear resistance and anti-electromagnetic interference, etc., meets the demand of long-term safe and reliable operation of industrial robot.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically a flexible fire-resistant robot cable. Background Technology

[0002] With the improvement of industrial automation, robots have been widely used in welding, painting, handling, assembly, and hazardous environment operations. Robots rely on cables for power transmission and signal transmission during operation; therefore, the flexibility, bending resistance, and flame retardancy of the cables directly affect the stability and safety of robot operation.

[0003] Existing robot cables typically use materials such as polyolefins, polyvinyl chloride, or silicone rubber as insulation and sheath layers to improve their insulation and heat resistance. However, the flexibility of conventional cables relies mainly on the material's toughness. Under prolonged pressure or frequent bending, stress concentration can easily occur, leading to cracking or conductor breakage, indicating insufficient flexibility. Secondly, existing cables have poor fire resistance and easily produce large amounts of toxic fumes when burning, which is detrimental to safety. Furthermore, abrasion resistance and electromagnetic interference resistance are also essential for cable operation. Therefore, it is necessary to provide a robot cable that combines excellent flexibility, fire resistance, abrasion resistance, and shielding performance to meet the requirements of long-term reliable operation of robots under complex working conditions. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a flexible fire-resistant robot cable, which effectively improves upon the shortcomings of some traditional robot cables in terms of cable flexibility, fire resistance, wear resistance, and shielding capabilities.

[0005] A flexible fire-resistant robot cable includes a predetermined number of cables, a flame-retardant filling layer, and a protective layer. The cables include a conductor and, from the inside out, an inner insulation layer, an inner shielding layer, and a fireproof layer that are sequentially wrapped around the outside of the conductor. The protective layer includes, from the inside out, a flexible layer, an outer shielding layer, an outer insulation layer, an inner halogen-free low-smoke flame-retardant layer, a heat insulation layer, an outer halogen-free low-smoke flame-retardant layer, and a wear-resistant layer that are sequentially wrapped around the outside of the cables. The flame-retardant filling layer fills the gap between the flexible layer and the cables. The flexible layer includes a predetermined number of arc-shaped flexible members arranged in a ring. An M-shaped flexible connector is provided between two adjacent arc-shaped flexible members. A separator is provided on the middle of the arc-shaped flexible member near the cable side, extending towards the cable side. The separator is provided between two cables, and a cavity is provided at the end of the separator away from the M-shaped flexible connector.

[0006] Preferably, the outer wall of the arc-shaped flexible member away from the cable has multiple V-shaped grooves recessed towards the cable side.

[0007] Preferably, the flame-retardant filler layer is a halogen-free, low-smoke flame-retardant PP rope filler layer or a halogen-free, low-smoke flame-retardant glass fiber rope filler layer.

[0008] Preferably, the inner insulation layer is a cross-linked polyolefin insulation layer, a cross-linked polyethylene insulation layer, or a silicone rubber insulation layer.

[0009] Preferably, the fireproof layer is a mica tape wrapped fireproof layer, a ceramicized silicone rubber fireproof layer, or an inorganic ceramic tape wrapped fireproof layer.

[0010] Preferably, the outer insulation layer is a halogen-free low-smoke polyolefin insulation layer, a cross-linked polyolefin insulation layer, or a thermoplastic polyurethane insulation layer.

[0011] Preferably, the heat insulation layer is a ceramicized silicone rubber heat insulation layer, an inorganic ceramic tape wrapped heat insulation layer, an aerogel heat insulation layer, or a glass fiber tape wrapped heat insulation layer.

[0012] Preferably, the inner shielding layer and the outer shielding layer are tin-plated copper wire braided shielding layers, nickel-plated copper wire braided shielding layers, or copper strip wrapped shielding layers.

[0013] Preferably, the inner halogen-free low-smoke flame retardant layer and the outer halogen-free low-smoke flame retardant layer are halogen-free low-smoke polyolefin flame retardant layers, halogen-free low-smoke cross-linked polyolefin flame retardant layers, halogen-free low-smoke polyethylene flame retardant layers, halogen-free low-smoke polyvinyl chloride flame retardant layers, or halogen-free low-smoke thermoplastic elastomer flame retardant layers.

[0014] Preferably, the wear-resistant layer is a hard rubber wear-resistant layer, a polytetrafluoroethylene wear-resistant layer, or stainless steel powder sprayed onto the outer surface of the outer halogen-free low-smoke flame-retardant layer.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides a flexible fire-resistant robot cable, comprising a predetermined number of cables, a flame-retardant filling layer, and a protective layer. The protective layer comprises, from the inside out, a flexible layer, an outer shielding layer, an outer insulation layer, an inner halogen-free low-smoke flame-retardant layer, a heat insulation layer, an outer halogen-free low-smoke flame-retardant layer, and a wear-resistant layer, sequentially covering the outside of the cables. The flame-retardant filling layer fills the gap between the flexible layer and the cables. Firstly, the flexible layer within the protective layer consists of multiple annularly arranged arc-shaped flexible elements and M-shaped flexible connectors connecting the arc-shaped flexible elements. The arc-shaped flexible elements themselves are flexible and can naturally deform with cable bending, while the M-shaped flexible connectors can achieve a certain degree of expansion and contraction when the cable is compressed or bent. Combined with the deformation of the arc-shaped flexible elements, this effectively disperses stress. Therefore, the synergistic effect of the arc-shaped flexible elements and the M-shaped flexible connectors significantly improves the overall flexibility and bending recovery capability of the cable. Secondly, the separators near the cable side of the arc-shaped flexible component and the cavities at its ends not only optimize the spatial layout between the cables, preventing conductors from squeezing each other and improving overall structural stability, but also ensure a uniform distribution of the flame-retardant filler layer. This prevents significant displacement or shifting of the flame-retardant filler layer during pressure or bending, thus guaranteeing the uniformity of flame-retardant performance and the overall fire resistance reliability of the cable. Furthermore, the multi-layered flame-retardant structure—comprising the flame-retardant filler layer, inner halogen-free low-smoke flame-retardant layer, outer halogen-free low-smoke flame-retardant layer, and heat insulation layer—ensures the cable maintains its flame-retardant effect for extended periods under high temperatures or flame conditions, while reducing the release of harmful fumes. The inner and outer shielding layers enhance electromagnetic interference resistance, ensuring stable and reliable signal transmission, while the outermost abrasion-resistant layer improves the cable's abrasion resistance, enabling it to adapt to the complex motion environment of robots and extending its service life. Therefore, this flexible fire-resistant robot cable exhibits strong performance in terms of flexibility, fire resistance, abrasion resistance, and electromagnetic interference resistance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the flexible fire-resistant robot cable described in this utility model; in: 10-Cable, 20-Flame-retardant filler layer, 30-Protective layer, 11-Conductor, 12-Inner insulation layer, 13-Inner shielding layer, 14-Fireproof layer, 31-Flexible layer, 32-Outer shielding layer, 33-Outer insulation layer, 34-Inner halogen-free low-smoke flame-retardant layer, 35-Heat insulation layer, 36-Outer halogen-free low-smoke flame-retardant layer, 37-Abrasion-resistant layer, 311-Arc-shaped flexible component, 312-M-shaped flexible connector, 313-V-groove. Detailed Implementation

[0017] The embodiments described below are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] See Figure 1 This embodiment provides a flexible fire-resistant robot cable, comprising a predetermined number of cables 10, a flame-retardant filling layer 20, and a protective layer 30. The cable 10 includes a conductor 11 and, from the inside out, an inner insulation layer 12, an inner shielding layer 13, and a fire-resistant layer 14 sequentially covering the outside of the conductor 11. The protective layer 30 includes, from the inside out, a flexible layer 31, an outer shielding layer 32, an outer insulation layer 33, an inner halogen-free low-smoke flame-retardant layer 34, a heat insulation layer 35, an outer halogen-free low-smoke flame-retardant layer 36, and a wear-resistant layer 37 sequentially covering the outside of the cable 10. 7. The flame-retardant filling layer 20 fills the gap between the flexible layer 31 and the cable 10; wherein, the flexible layer 31 includes a predetermined number of arc-shaped flexible members 311 arranged in a ring, and an M-shaped flexible connector 312 is connected between two adjacent arc-shaped flexible members 311. A separator is provided on the middle part of the arc-shaped flexible member 311 near the cable 10 and extending towards the cable side. The separator is provided between the two cables, and a cavity is provided at the end of the separator away from the M-shaped flexible connector 312.

[0019] Preferably, the outer wall of the arc-shaped flexible member 311 away from the cable 10 has a plurality of V-shaped grooves 313 recessed towards the cable 10. The V-shaped grooves 313 can provide additional deformation space when the cable is compressed or bent, making the arc-shaped flexible member 311 more flexible, thereby further improving the overall flexibility and bending recovery ability of the flexible layer 31, while also helping to disperse stress and reduce the impact of stress concentration on the cable 10 and the flame-retardant filler layer 20.

[0020] Preferably, the separator includes a long strip-shaped separator body and a circular buffer end disposed at the end of the separator body. The circular buffer end has a cavity at its center. It should be noted that the cavity can provide a certain buffer and deformation space when the cable is compressed or bent, thereby improving the protection of the flame-retardant filling layer 20 and the cable 10 at the end of the separator and reducing the displacement or local compression of the flame-retardant filling layer 20 and the cable 10 during the stress process.

[0021] Preferably, the flame-retardant filler layer 20 is a halogen-free, low-smoke flame-retardant PP rope filler layer 20 or a halogen-free, low-smoke flame-retardant glass fiber rope filler layer 20. This flame-retardant filler layer 20 not only possesses excellent flame-retardant properties and low-smoke characteristics, but also exhibits a certain degree of flexibility and compressibility. It can effectively fill the gap between the flexible layer 31 and the cable 10, maintaining a uniform distribution when the cable is compressed or bent, preventing displacement or shifting, thereby enhancing the overall fire resistance and structural stability of the cable. Furthermore, the rope-like structure of the flame-retardant filler layer 20 can distribute the stress of the cable under tension, improving the cable's tensile strength and overall durability, enabling the cable to maintain structural integrity and functional reliability even after long-term use in the complex motion environment of a robot.

[0022] Preferably, the inner insulation layer 12 is a cross-linked polyolefin insulation layer, a cross-linked polyethylene insulation layer, or a silicone rubber insulation layer, which can provide good electrical insulation and heat resistance, ensuring the safe operation of the conductor 11 in high temperature or high voltage environments. The outer insulation layer 33 is a halogen-free low-smoke polyolefin insulation layer, a cross-linked polyolefin insulation layer, or a thermoplastic polyurethane insulation layer, used to enhance the insulation and fire resistance of the cable, while meeting the low-smoke and halogen-free environmental protection requirements, providing reliable electrical isolation for the multi-layer protective structure of the cable.

[0023] Preferably, the fireproof layer 14 is a mica tape wrapped fireproof layer 14, a ceramicized silicone rubber fireproof layer 14, or an inorganic ceramic tape wrapped fireproof layer 14. This fireproof layer 14 can effectively insulate heat in high-temperature or flame environments, preventing heat damage to the conductor 11 and the inner insulation layer 12. At the same time, in conjunction with structures such as the flame-retardant filler layer 20, it improves the overall fire resistance and safety reliability of the cable.

[0024] Preferably, the heat insulation layer 35 is a ceramicized silicone rubber heat insulation layer 35, an inorganic ceramic tape wrapped heat insulation layer 35, an aerogel heat insulation layer 35, or a glass fiber tape wrapped heat insulation layer 35. This heat insulation layer 35 can effectively block heat transfer to the inner layer under conditions of increased external cable temperature or localized fire, protecting the cable 10 from high-temperature damage, thereby improving the overall fire resistance and long-term operational safety and reliability of the cable.

[0025] Preferably, the inner shielding layer 13 and the outer shielding layer 32 are tin-plated copper wire braided shielding layers, nickel-plated copper wire braided shielding layers, or copper strip wrapped shielding layers. The combination of the inner shielding layer 13 and the outer shielding layer 32 can effectively suppress the influence of external electromagnetic interference on the cable signal, while reducing the electromagnetic radiation of the cable itself, ensuring stable and reliable signal transmission of the cable in complex industrial environments, and improving the accuracy and safety of robot operation.

[0026] Preferably, the inner halogen-free low-smoke flame-retardant layer 34 and the outer halogen-free low-smoke flame-retardant layer 36 are halogen-free low-smoke polyolefin flame-retardant layers, halogen-free low-smoke cross-linked polyolefin flame-retardant layers, halogen-free low-smoke polyethylene flame-retardant layers, halogen-free low-smoke polyvinyl chloride flame-retardant layers, or halogen-free low-smoke thermoplastic elastomer flame-retardant layers. The inner halogen-free low-smoke flame-retardant layer 34 and the outer halogen-free low-smoke flame-retardant layer 36 work synergistically to provide stronger flame-retardant protection in high-temperature or flame environments, while reducing the release of harmful fumes. Combined with the flame-retardant filler layer 20 and the heat insulation layer 35, they further enhance the overall fire resistance and safety of the cable.

[0027] Preferably, the wear-resistant layer 37 is a hard rubber wear-resistant layer 37, a polytetrafluoroethylene wear-resistant layer 37, or stainless steel powder sprayed onto the outer surface of the outer halogen-free low-smoke flame-retardant layer 36. This wear-resistant layer 37 effectively improves the cable's wear resistance and tensile strength, protecting the cable from long-term bending, friction, or mechanical impact, maintaining its structural integrity, and extending the cable's service life.

[0028] The flexible fire-resistant robot cable provided by this utility model includes a predetermined number of cables 10, a flame-retardant filling layer 20, and a protective layer 30. The protective layer 30 includes, from the inside out, a flexible layer 31, an outer shielding layer 32, an outer insulation layer 33, an inner halogen-free low-smoke flame-retardant layer 34, a heat insulation layer 35, an outer halogen-free low-smoke flame-retardant layer 36, and a wear-resistant layer 37, which are sequentially wrapped around the outside of the cable 10. The flame-retardant filling layer 20 fills the gap between the flexible layer 31 and the cable 10. First, the flexible layer 31 in the protective layer 30 is composed of a plurality of arc-shaped flexible elements 311 arranged in a ring and M-shaped flexible connectors connected between the arc-shaped flexible elements 311. The arc-shaped flexible elements 311 themselves are flexible and can naturally deform with the bending of the cable, while the M-shaped flexible connectors can achieve a certain degree of expansion and contraction when the cable is compressed or bent. Combined with the deformation of the arc-shaped flexible elements 311, stress is effectively dispersed. Therefore, the synergistic effect of the arc-shaped flexible component 311 and the M-shaped flexible connector significantly improves the overall flexibility and bending recovery capability of the cable. Secondly, the separator and the cavity at the end of the arc-shaped flexible component 311 near the cable 10 not only optimize the spatial layout between the cables 10, preventing the conductors 11 from squeezing each other and improving the overall structural stability, but also allow the flame-retardant filling layer 20 to be evenly distributed, avoiding large displacement or shifting of the flame-retardant filling layer 20 during pressure or bending, thereby ensuring the uniformity of flame-retardant performance and the overall fire resistance reliability of the cable. Furthermore, the multi-layered flame-retardant structure, consisting of a flame-retardant filler layer 20, an inner halogen-free low-smoke flame-retardant layer 34, an outer halogen-free low-smoke flame-retardant layer 36, and a heat insulation layer 35, enables the cable to maintain its flame-retardant effect for extended periods under high-temperature or flame conditions, while simultaneously reducing the release of harmful fumes. The inner shielding layer 13 and outer shielding layer 32 enhance electromagnetic interference resistance, ensuring stable and reliable signal transmission. The outermost abrasion-resistant layer 37 improves the cable's abrasion resistance, enabling it to adapt to the complex motion environment of robots and extending its service life. Therefore, this flexible fire-resistant robot cable exhibits strong performance in terms of flexibility, fire resistance, abrasion resistance, and electromagnetic interference resistance.

[0029] The above-disclosed embodiments are merely some preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.

Claims

1. A flexible fire resistant robotic cable, characterized by: The device comprises a predetermined number of cables, a flame-retardant filling layer, and a protective layer. The cables include a conductor and, from the inside out, an inner insulation layer, an inner shielding layer, and a fire-resistant layer that sequentially cover the outside of the conductor. The protective layer includes, from the inside out, a flexible layer, an outer shielding layer, an outer insulation layer, an inner halogen-free low-smoke flame-retardant layer, a heat insulation layer, an outer halogen-free low-smoke flame-retardant layer, and a wear-resistant layer that sequentially cover the outside of the cables. The flame-retardant filling layer fills the gap between the flexible layer and the cables. The flexible layer includes a predetermined number of arc-shaped flexible members arranged in a ring. An M-shaped flexible connector is provided between two adjacent arc-shaped flexible members. A separator is provided at the middle of the arc-shaped flexible member near the cable and extending towards the cable. The separator is provided between two cables, and a cavity is provided at the end of the separator away from the M-shaped flexible connector.

2. The flexible fire resistant robotic cable of claim 1, wherein, The outer wall of the arc-shaped flexible component, on the side away from the cable, has multiple V-shaped grooves recessed towards the cable side.

3. The flexible fire resistant robotic cable of claim 1, wherein, The flame-retardant filling layer is a halogen-free, low-smoke, flame-retardant PP rope filling layer or a halogen-free, low-smoke, flame-retardant glass fiber rope filling layer.

4. The flexible fire resistant robotic cable of claim 1, wherein, The inner insulation layer is a cross-linked polyolefin insulation layer, a cross-linked polyethylene insulation layer, or a silicone rubber insulation layer.

5. The flexible fire resistant robotic cable of claim 1, wherein, The fireproof layer is a mica tape wrapped fireproof layer, a ceramicized silicone rubber fireproof layer, or an inorganic ceramic tape wrapped fireproof layer.

6. The flexible fire resistant robotic cable of claim 1, wherein, The outer insulation layer is a halogen-free low-smoke polyolefin insulation layer, a cross-linked polyolefin insulation layer, or a thermoplastic polyurethane insulation layer.

7. The flexible fire resistant robotic cable of claim 1, wherein, The insulation layer is a ceramicized silicone rubber insulation layer, an inorganic ceramic tape wrapped insulation layer, an aerogel insulation layer, or a glass fiber tape wrapped insulation layer.

8. The flexible fire resistant robotic cable of claim 1, wherein, The inner shielding layer and the outer shielding layer are tin-plated copper wire braided shielding layers, nickel-plated copper wire braided shielding layers, or copper strip wrapped shielding layers.

9. The flexible fire resistant robotic cable of claim 1, wherein, The inner halogen-free low-smoke flame retardant layer and the outer halogen-free low-smoke flame retardant layer are halogen-free low-smoke polyolefin flame retardant layers, halogen-free low-smoke cross-linked polyolefin flame retardant layers, halogen-free low-smoke polyethylene flame retardant layers, halogen-free low-smoke polyvinyl chloride flame retardant layers, or halogen-free low-smoke thermoplastic elastomer flame retardant layers.

10. The flexible fire resistant robotic cable of claim 1, wherein, The wear-resistant layer is a hard rubber wear-resistant layer, a polytetrafluoroethylene wear-resistant layer, or stainless steel powder sprayed onto the outer surface of the outer halogen-free low-smoke flame-retardant layer.

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