Flexible flame-retardant indoor photoelectric composite cable with multi-layer composite compression-resistant structure

Abstract

The utility model relates to a flexible flame-retardant indoor photoelectric composite cable with a multilayer composite compression-resistant structure, which comprises a central supporting unit, a cable core assembly, a composite reinforcing layer, a flame-retardant layer and an outer sheath which are sequentially arranged from inside to outside, the adjacent elastic rods are bonded through hot melting to form a 90-degree orthogonal supporting structure, the cable core assembly comprises optical fiber units and power conductors which are symmetrically distributed in four quadrants of a central supporting unit, one optical fiber unit and one power conductor are arranged in each quadrant, and the four macromolecule elastic rods arranged in a cross shape form a supporting framework. A stable internal supporting structure is provided for the whole optical cable, it is ensured that the optical cable structure is not prone to deformation in a complex environment, the section of the macromolecule elastic rod is fan-shaped, the containing groove is filled with thixotropic silica gel, the buffering and damping effect is further enhanced, internal assemblies can be better protected, and the optical cable is suitable for different installation and use environments.

Description

Technical Field

[0001] This utility model relates to the field of optoelectronic composite cable technology, and in particular to a flexible flame-retardant indoor optoelectronic composite cable with a multi-layer composite pressure-resistant structure. Background Technology

[0002] With the rapid development of the information age, the demand for indoor communication and power transmission is increasing. As a key transmission medium, the performance and structural design of indoor optical fiber composite cables have attracted widespread attention. Traditional indoor optical fiber composite cables have revealed many problems in practical applications.

[0003] In terms of support structure, some indoor fiber optic composite cables have a single central support structure, which cannot effectively cope with complex installation environments and external forces. This can easily lead to deformation of the internal structure of the fiber optic composite cable, affecting signal transmission and service life. During the wiring process inside buildings, the cable may be subjected to various external forces such as bending and stretching. Ordinary support structures are difficult to provide stable support. In terms of cable core component layout, early indoor fiber optic cables often separated signal transmission and power transmission functions or had unreasonable layouts, resulting in low space utilization efficiency and easy generation of electromagnetic interference, affecting the stability of signal transmission. This problem is particularly prominent in indoor environments that need to transmit multiple signals and power simultaneously, such as intelligent buildings and data centers. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a flexible flame-retardant indoor optical fiber composite cable with a multi-layer composite pressure-resistant structure.

[0005] The present invention provides a flexible flame-retardant indoor optical fiber composite cable with a multi-layer composite compression-resistant structure, which adopts the following technical solution:

[0006] A flexible flame-retardant indoor optical-electric composite cable with a multi-layer composite pressure-resistant structure includes a central support unit, a cable core assembly, a composite reinforcing layer, a flame-retardant layer, and an outer sheath arranged sequentially from the inside out. The central support unit consists of a support skeleton formed by four cross-shaped fixed polymer elastic rods, with adjacent elastic rods bonded together by hot-melt bonding to form a 90° orthogonal support structure. The cable core assembly includes optical fiber units and power conductors symmetrically distributed in the four quadrants of the central support unit, with one optical fiber unit and one power conductor in each quadrant. The composite reinforcing layer is composed of two alternating layers of orthogonally woven aramid fiber and glass fiber. The flame-retardant layer is made of ceramicized silicone rubber material. The optical fiber unit includes an insulation layer with an interference fit and a shielding layer woven outside the insulation layer.

[0007] Optionally, the polymer elastic rods of the central support unit have a fan-shaped cross-section, and a receiving groove is formed between adjacent elastic rods, which is filled with thixotropic silicone gel.

[0008] Optionally, the aramid fiber layer in the composite reinforcing layer has a weaving angle of 45±5°, the glass fiber layer has a weaving angle of -45±5°, and the weaving density of both layers is 12-14 threads / cm.

[0009] Optionally, an aluminum foil Mylar layer is provided between the flame-retardant and heat-insulating layer and the composite reinforcing layer, and a conductive adhesive strip is provided at the overlap of the aluminum foil Mylar layer.

[0010] Optionally, an isolation strip is provided between the optical fiber unit and the power conductor, the isolation strip being composed of a composite of polyimide film and aluminized polyester film.

[0011] In summary, this utility model has at least one of the following beneficial technical effects:

[0012] 1. Four polymer elastic rods arranged in a cross shape form a support skeleton, providing a stable internal support structure for the entire optical cable. This ensures that the optical cable structure is not easily deformed in complex environments. The cross-section of the polymer elastic rods is fan-shaped and the grooves are filled with thixotropic silicone gel, which further enhances the buffering and shock absorption effect. This better protects the internal components and adapts to different installation and usage environments. Furthermore, the symmetrical layout helps to balance the distribution of electric and magnetic fields, so that the electromagnetic fields generated by the power conductors cancel each other out or weaken inside the optical cable, reducing interference to the signal transmission of the optical fiber unit.

[0013] 2. The composite reinforcing layer is composed of two alternating layers of orthogonally woven aramid fiber and glass fiber, which combines the high strength of aramid fiber and the rigidity of glass fiber, greatly enhancing the tensile and bending resistance of the optical cable. The aluminum foil Mylar layer and the conductive adhesive strip at the overlap enhance the electromagnetic shielding performance, while preventing the intrusion of moisture and impurities, thus improving the stability and service life of the optical cable.

[0014] 3. An isolation strip is provided between the optical fiber unit and the power conductor. This isolation strip is composed of a composite of polyimide film and aluminized polyester film, which effectively isolates the optical fiber unit and the power conductor, reduces electromagnetic interference, and ensures the stability of signal and power transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a flexible, flame-retardant indoor optical-electric composite cable with a multi-layered composite pressure-resistant structure.

[0016] Figure 2 This is a cross-sectional view of a flexible, flame-retardant indoor optical-electric composite cable with a multi-layered composite pressure-resistant structure.

[0017] Explanation of reference numerals in the attached drawings: 1. Central support unit; 11. Modified silicone gel; 2. Cable core assembly; 21. Optical fiber unit; 211. Insulation layer; 212. Shielding layer; 22. Power conductor; 3. Composite reinforcement layer; 4. Flame retardant layer; 5. Outer sheath; 6. Aluminum foil Mylar layer; 61. Conductive adhesive strip; 7. Insulation strip. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] This utility model discloses a flexible flame-retardant indoor optical fiber composite cable with a multi-layered composite compression-resistant structure. (Refer to...) Figure 1-2A flexible flame-retardant indoor optical-electric composite cable with a multi-layer composite pressure-resistant structure includes, from the inside out, a central support unit 1, a cable core assembly 2, a composite reinforcing layer 3, a flame-retardant layer 4, and an outer sheath 5. The central support unit 1 consists of a support frame formed by four cross-shaped, interlocking polymer elastic rods. Adjacent elastic rods are bonded together by thermal fusion to form a 90° orthogonal support structure. The cable core assembly 2 includes optical fiber units 21 and power conductors 22 symmetrically distributed in the four quadrants of the central support unit 1, with one optical fiber unit 21 and one power conductor 22 in each quadrant. The composite reinforcing layer 3 is composed of alternating layers of orthogonally woven aramid fiber and glass fiber. The flame-retardant layer 4 is made of ceramicized silicone rubber. The optical fiber unit 21 includes an insulation layer 211 with an interference fit. The shielding layer 212 is woven outside the insulation layer 211. The cross-section of the polymer elastic rod of the central support unit 1 is fan-shaped, and a receiving groove is formed between adjacent elastic rods. The receiving groove is filled with thixotropic silicone gel 11. Through this design, four polymer elastic rods arranged in a cross shape form a support skeleton, providing a stable internal support structure for the entire optical cable. This ensures that the optical cable structure is not easily deformed in complex environments. The fan-shaped cross-section of the polymer elastic rod and the thixotropic silicone gel 11 filling the receiving groove further enhance the buffering and shock absorption effect, better protect the internal components, adapt to different installation and use environments, and the symmetrical layout helps to balance the distribution of electric and magnetic fields, so that the electromagnetic field generated by the power conductor 22 cancels or weakens each other inside the optical cable, reducing interference to the signal transmission of the optical fiber unit 21.

[0022] The aramid fiber layer in the composite reinforcing layer 3 has a braiding angle of 45±5° and the glass fiber layer has a braiding angle of -45±5°. The braiding density of both layers is 12-14 strands / cm. Furthermore, an aluminum foil Mylar layer 6 is provided between the flame-retardant and heat-insulating layer and the composite reinforcing layer 3. A conductive adhesive strip 61 is provided at the overlap of the aluminum foil Mylar layer 6. The advantage of this design is that the composite reinforcing layer 3 is composed of two orthogonally braided alternating layers of aramid fiber and glass fiber, which combines the high strength of aramid fiber and the rigidity of glass fiber, greatly enhancing the tensile and bending resistance of the optical cable. The aluminum foil Mylar layer 6 and the conductive adhesive strip 61 at the overlap enhance the electromagnetic shielding performance, while preventing the intrusion of moisture and impurities, thus improving the stability and service life of the optical cable.

[0023] An isolation strip 7 is provided between the optical fiber unit 21 and the power conductor 22. The isolation strip 7 is composed of a polyimide film and an aluminized polyester film, which effectively isolates the optical fiber unit 21 and the power conductor 22, reduces electromagnetic interference, and ensures the stability of signal and power transmission.

[0024] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A flexible flame-retardant indoor optical-electric composite cable with a multi-layer composite compression-resistant structure, characterized in that: The cable core assembly includes a central support unit (1), a cable core assembly (2), a composite reinforcement layer (3), a flame retardant layer (4), and an outer sheath (5) arranged sequentially from the inside out. The central support unit (1) is composed of four cross-shaped polymer elastic rods forming a support skeleton. Adjacent elastic rods are bonded together by hot melt to form a 90° orthogonal support structure. The cable core assembly (2) includes optical fiber units (21) and power conductors (22) symmetrically distributed in the four quadrants of the central support unit (1). Each quadrant contains one optical fiber unit (21) and one power conductor (22). The composite reinforcement layer (3) is composed of two layers of orthogonally woven aramid fiber and glass fiber alternating. The flame retardant layer (4) is made of ceramicized silicone rubber material. The optical fiber unit (21) includes an insulation layer (211) covered with an interference fit and a shielding layer (212) woven outside the insulation layer (211).

2. The flexible flame-retardant indoor optical-electric composite cable with a multi-layer composite compression-resistant structure according to claim 1, characterized in that: The cross-section of the polymer elastic rod of the central support unit (1) is fan-shaped, and a receiving groove is formed between adjacent elastic rods. The receiving groove is filled with thixotropic silicone gel (11).

3. A flexible flame-retardant indoor optical-electric composite cable with a multi-layer composite compression-resistant structure according to claim 1, characterized in that: The aramid fiber layer in the composite reinforcing layer (3) has a weaving angle of 45±5° and a glass fiber layer has a weaving angle of -45±5°. The weaving density of both layers is 12-14 threads / cm.

4. A flexible flame-retardant indoor optical-electric composite cable with a multi-layer composite compression-resistant structure according to claim 1, characterized in that: An aluminum foil Mylar layer (6) is provided between the flame retardant layer (4) and the composite reinforcing layer (3), and a conductive adhesive strip (61) is provided at the overlap of the aluminum foil Mylar layer (6).

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