CN215067460U - Fire-resistant optical cable - Google Patents
Fire-resistant optical cable Download PDFInfo
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- CN215067460U CN215067460U CN202121470167.6U CN202121470167U CN215067460U CN 215067460 U CN215067460 U CN 215067460U CN 202121470167 U CN202121470167 U CN 202121470167U CN 215067460 U CN215067460 U CN 215067460U
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Abstract
The utility model provides a fire-resistant optical cable includes cable core and cladding in the peripheral non-metallic sheath of cable core, the cable core is including central unit of strengthening, a plurality of light units, packing unit and water blocking layer, central unit of strengthening includes the reinforcement and the cladding in the first non-metallic flame retardant coating of reinforcement, a plurality of light units and packing unit form the cable core around locating central unit of strengthening, each light unit includes signal transmission piece, the sleeve pipe and the non-metallic flame retardant coating of second of holding signal transmission piece, the packing unit includes packing and cladding in the peripheral non-metallic flame retardant coating of third of packing, the water blocking layer cladding is peripheral in a plurality of light units. The fire-resistant optical cable has the advantages that the plurality of non-metal fire-resistant layers are arranged in the cable core, so that the cable core is well protected from fire; meanwhile, the fire-resistant optical cable has strong electromagnetic interference resistance by adopting an all-dielectric nonmetal structure, and has the advantages of light weight, good toughness, convenience in laying, installation, construction and the like.
Description
Technical Field
The application relates to the technical field of optical cables, in particular to a fire-resistant optical cable.
Background
Although the common fire-resistant optical cable plays a role in fire prevention to a certain extent, the common fire-resistant optical cable is of a metal armored structure, has poor lightning protection and electromagnetic interference resistance, is not suitable for being applied to occasions such as communication machine rooms, data centers and power facilities, and is heavy in quality, poor in flexibility and inconvenient to lay, install and construct.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a fire-resistant optical cable to solve the above problems.
The utility model provides a fire-resistant optical cable, includes the cable core and the cladding in the peripheral non-metallic sheath of cable core, the cable core includes central unit, a plurality of light units and the water blocking layer of strengthening, central unit of strengthening includes the reinforcement and the cladding in the first non-metallic flame retardant coating of reinforcement, a plurality of light units are around locating around the central unit of strengthening, each light unit includes signal transmission piece, the sleeve pipe and the non-metallic flame retardant coating of second of holding signal transmission piece, the water blocking layer cladding in a plurality of light unit are peripheral.
Further, the second non-metal refractory layer is coated on the periphery of the signal transmission piece.
Further, the second non-metal refractory layer is coated on the periphery of the sleeve.
Furthermore, the cable core further comprises a filling unit positioned on the periphery of the central reinforcing unit, the filling unit comprises a filling piece and a third non-metal fire-resistant layer, and the third non-metal fire-resistant layer is coated on the periphery of the filling piece.
Further, the cable core further comprises a water blocking member disposed between the light unit and the central reinforcing unit.
Further, the nonmetal sheath comprises an inner sheath layer, an outer sheath layer and a fourth nonmetal fire-resistant layer arranged between the inner sheath layer and the outer sheath layer.
Further, the non-metallic sheath further comprises a reinforcement layer disposed between the fourth non-metallic refractory layer and the outer jacket.
The first nonmetal fire-resistant layer, the second nonmetal fire-resistant layer and the third nonmetal fire-resistant layer are arranged in the cable core of the fire-resistant optical cable, so that the cable core is well protected from being flaming; meanwhile, the fire-resistant optical cable has strong electromagnetic interference resistance by adopting an all-dielectric nonmetal structure, and has the advantages of light weight, good toughness, convenience in laying, installation, construction and the like.
Drawings
Fig. 1 is a schematic structural view of a fire resistant optical cable according to an embodiment of the present application.
Fig. 2 is a flow chart of a method of making a fire resistant fiber optic cable according to an embodiment of the present disclosure.
Fig. 3 is a flowchart illustrating the detailed steps of step S22 in fig. 2.
Description of the main elements
Fire resistant optical cable 100
Non-metallic sheath 20
Filling unit 13
Water-resistant layer 15
Reinforcing member 111
First non-metallic refractory layer 112
Second non-metallic refractory layer 123
Water-blocking object 124
Filling member 131
Third non-metallic refractory layer 132
Fourth non-metallic refractory layer 23
Reinforcing layer 24
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and detailed description. In addition, the features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the invention, and the described embodiments are merely some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the scope protected by the embodiments of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention belong. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the invention.
Please refer to fig. 1, which is a schematic structural diagram of a fire-resistant optical cable 100 according to an embodiment of the present disclosure. The fire-resistant optical cable 100 comprises a cable core 10 and a non-metal sheath 20. The cable core 10 is used for transmitting signals. The nonmetal jacket 20 is coated on the periphery of the cable core 10 and used for protecting the cable core 10.
The cable core 10 comprises a central reinforcing unit 11, a plurality of optical units 12 wound on the periphery of the central reinforcing unit 11, a filling unit 13 positioned on the periphery of the central reinforcing unit 11, a water blocking piece 14 and a water blocking layer 15 positioned on the outermost side of the cable core 10, and a layer-stranded cable core is formed together. The structure of the cable core 10 is not limited to the layer-stranded structure shown in fig. 1, and a central tubular structure may be adopted, and when the cable core 10 is the central tubular structure, the cable core 10 includes the optical unit 12 and the water blocking layer 15. In addition, the structure of the cable core 10 can be adjusted according to the number of the optical fiber cores, and one or more filling units 13 can be adopted to replace the optical units 12.
The central reinforcing unit 11 includes a reinforcing member 111 and a first non-metallic refractory layer 112 coated on the reinforcing member 111. The strength members 111 are used to increase the structural stability of the fire resistant fiber optic cable 100 and to increase the tensile strength of the fire resistant fiber optic cable 100. The reinforcement 111 may be a glass fiber reinforced plastic rod, an aramid fiber reinforced plastic rod, a basalt fiber reinforced plastic rod, or the like. The first non-metal fire-resistant layer 112 is coated on the periphery of the strength member 111 and is used for preventing the strength member 111 from being fiberized when being burned, which results in the reduction of the structural stability of the fire-resistant optical cable 100. The first non-metal fire-resistant layer 112 can be mica tape, glass fiber woven tape, ceramic silicon rubber fire-resistant tape, high fire-retardant oxygen-insulating glass cloth tape, polyimide film, etc.
The plurality of light units 12 are wound around the central reinforcing unit 11. Each of the light units 12 includes a signal transmission member 121, a sleeve 122 and a second non-metal refractory layer 123. The signal transmission member 121 is used for transmitting signals, and may be an optical fiber ribbon, an optical fiber bundle, a dispersive optical fiber, or the like. The sleeve 122 is used for accommodating the signal transmission member 121, and may be made of Polybutylene terephthalate (PBT), Polycarbonate (PC), polypropylene (PP), and the like. The second non-metallic refractory layer 123 is disposed on the outside of the signal transmission member 121 for preventing the signal transmission member 121 from being burned. The second non-metal fire-resistant layer 123 can be mica tape, glass fiber woven tape, ceramic silicon rubber fire-resistant tape, high fire-retardant fire-proof oxygen-insulating glass cloth tape, polyimide film, and the like. In one embodiment, the second non-metallic refractory layer 123 covers the periphery of the signal transmission element 121. In another embodiment, the second non-metallic refractory layer 123 is coated on the outer periphery of the sleeve 122. In one embodiment, each of the light units 12 further includes a water-blocking object 124, and the water-blocking object 124 is disposed around the signal transmission member 121 for blocking water from flowing to the signal transmission member 121 to affect signal transmission. The water-blocking object 124 may be a dry water-blocking material or a flowing water-blocking material, the dry water-blocking material includes a water-blocking yarn and a water-blocking tape, and the flowing water-blocking material includes a fiber paste.
The water blocking member 14 is disposed between the light unit 12 and the central reinforcing unit 11, and is used for blocking water from flowing to the light unit 12 to affect the performance of the light unit 12. The water blocking member 14 may be a water blocking yarn.
The filling unit 13 comprises a filling member 131 and a third non-metallic refractory layer 132. Filler 131 is used for improving the roundness of fire-resistant optical cable 100, the filler can be materials such as Polyethylene (PE), polypropylene (PP), low smoke and zero halogen polyolefin (LSZH). The third non-metal refractory layer 132 is coated on the periphery of the filler 131, and is used for ensuring the structural stability of the cable core 10 after the filler 131 is burned. The third non-metal fire-resistant layer 132 can be a mica tape, a glass fiber woven tape, a ceramic silicon rubber fire-resistant tape, a high-fire-retardant fire-proof oxygen-insulating glass cloth tape, a polyimide film and the like.
The waterproof layer 15 covers the peripheries of the light units 12 and the filling units 13, and the central reinforcing unit 11, the light units 12 and the filling units 13 are arranged on the inner side of the waterproof layer 15. The water blocking layer 15 is used to block water from flowing to the inner side of the water blocking layer 15 to affect the performance of the central reinforcing unit 11, the plurality of light units 12 and the filling unit 13 therein. The water-blocking layer 15 may be a water-blocking tape.
As described above, in the cable core 10, the non-metal flame-resistant layer is coated outside the signal transmission member 121, and the flame-resistant layer is coated outside the reinforcing member 111 and the filler member 131, so that the flame resistance of the entire cable core 10 is enhanced, and the flame-resistant layer is coated outside the reinforcing member 111 and the filler member 131, so that the burning of the reinforcing member 111 and the filler member 131 is prevented, and the possibility of the burning of the signal transmission member 121 due to the burning of the reinforcing member 111 and the filler member 131 is reduced. Thus, the cable core 10 has better fire resistance as described above.
The non-metal sheath 20 includes an inner sheath 21, an outer sheath 22, and a fourth non-metal refractory layer 23 disposed between the inner sheath 21 and the outer sheath 22. The inner sheath layer 21 is coated on the periphery of the cable core 10 and used for protecting the cable core 10. The outer sheath 22 is located outside the inner sheath 21 for further protecting the cable core 10. The inner protective layer 21 and the outer protective layer 22 can be made of low-smoke halogen-free flame-retardant polyolefin, ceramic refractory, ceramic silicon rubber, flame-retardant oxygen-insulating material and the like. The fourth nonmetal fire-resistant layer 23 is coated on the periphery of the inner protection layer 21 and used for preventing the inner protection layer 21 from falling off in the combustion process and delaying the heat transfer to the cable core 10 in the combustion process. The fourth non-metal fire-resistant layer 23 can be a mica tape, a glass fiber woven tape, a ceramic silicon rubber fire-resistant tape, a high-fire-retardant fire-proof oxygen-insulating glass cloth tape, a polyimide film and the like. In an embodiment, the non-metallic sheath 20 further comprises a reinforcement layer 24 interposed between the fourth non-metallic refractory layer 23 and the outer sheath 22. The reinforcing layer 24 is used for further reinforcing the tensile strength of the fire-resistant optical cable 100, and may be a plurality of glass fiber yarns, aramid fibers, glass fiber woven tapes, glass fiber reinforced plastic rods, aramid fiber reinforced plastic rods, basalt fiber reinforced plastic rods, or the like.
In an embodiment, the non-metallic sheath 20 may include only the outer sheath 22 and the fourth non-metallic fire-resistant layer 23 disposed between the outer sheath 22 and the cable core 10, but not the inner sheath 21, i.e., the double-sheath structure of the fire-resistant optical cable 100 may be replaced by a single-sheath structure.
As above, the nonmetal sheath 20 covers the nonmetal flame retardant coating outside the inner sheath 21, so as to prevent the inner sheath 21 from burning, thereby reducing the possibility that the cable core 10 arranged in the inner sheath 21 is burnt, and the cable core 10 has a plurality of layers of nonmetal flame retardant coatings, so that the nonmetal flame retardant coating of the nonmetal sheath 20 and the plurality of layers of nonmetal flame retardant coatings in the cable core 10 protect the signal transmission part 121 together, so as to prevent the signal transmission part 121 from burning better and increase the stability of signal transmission.
Referring to fig. 2, the present invention further provides a method for manufacturing a fire-resistant optical cable, which comprises the following steps.
Step S21: a reinforcement is provided. The reinforcing part can be a glass fiber reinforced plastic rod, an aramid fiber reinforced plastic rod, a basalt fiber reinforced plastic rod and the like.
Step S22: and wrapping a first non-metal refractory layer around the periphery of the reinforcing piece to form a central reinforcing unit. The first non-metal fire-resistant layer can be mica tape, glass fiber woven tape, ceramic silicon rubber fire-resistant tape, high-fire-retardant fire-insulating oxygen-insulating glass cloth tape, polyimide film and the like.
Step S23: a plurality of signal transmission members are provided. The signal transmission member may be an optical fiber ribbon, an optical fiber bundle, a dispersive optical fiber, etc.
Step S24: a plurality of sleeves are provided, and the plurality of sleeves respectively accommodate the plurality of signal transmission pieces. The sleeve may be Polybutylene terephthalate (PBT), Polycarbonate (PC), polypropylene (PP), or the like.
Step S25: and longitudinally wrapping the second non-metal fire-resistant layer between the signal transmission piece and the sleeve through a longitudinal wrapping mold to form the optical unit. The second non-metal fire-resistant layer can be mica tape, glass fiber woven tape, ceramic silicon rubber fire-resistant tape, high-fire-retardant fire-insulating oxygen-insulating glass cloth tape, polyimide film and the like.
Step S26: a filler piece is provided. In one embodiment, the filling member is a filling rope.
Step S27: and coating a third non-metal refractory layer on the periphery of the filling piece through wrapping equipment to form a filling unit. The third non-metal fire-resistant layer can be mica tape, glass fiber woven tape, ceramic silicon rubber fire-resistant tape, high-fire-retardant fire-insulating oxygen-insulating glass cloth tape, polyimide film and the like.
Step S28: a water barrier is provided. In one embodiment, the water blocking member is a water blocking yarn.
Step S29: and the central reinforcing unit is used as a center, and the light units, the filling units and the water blocking pieces are surrounded and longitudinally wrapped by the water blocking layer to form the cable core. In one embodiment, the water-blocking layer may be a water-blocking tape, and the water-blocking tape may be wrapped with a binding yarn to ensure full-section water blocking of the component covered with the water-blocking layer.
Step S30: and forming a non-metal sheath coated on the periphery of the cable core.
Referring to fig. 3, in detail, the step S30 includes the following steps.
Step S31: and forming the inner protective layer positioned on the periphery of the cable core by extrusion molding through an extruding machine. The inner protective layer can be made of materials such as low-smoke halogen-free flame-retardant polyolefin, ceramic refractory materials, ceramic silicon rubber, flame-retardant oxygen-insulating materials and the like.
Step S32: and a fourth nonmetal refractory layer is formed by wrapping the periphery of the inner protective layer by wrapping equipment. The fourth non-metal fire-resistant layer can be mica tape, glass fiber woven tape, ceramic silicon rubber fire-resistant tape, high-fire-retardant fire-insulating oxygen-insulating glass cloth tape, polyimide film and the like.
Step S33: and twisting the periphery of the fourth non-metal refractory layer to form a reinforced layer. In one embodiment, the twisting pitch is 700 to 900 mm. The reinforced layer can be a plurality of glass fiber yarns, aramid fibers, glass fiber woven belts, glass fiber reinforced plastic rods, aramid fiber reinforced plastic rods, basalt fiber reinforced plastic rods and the like.
Step S34: an outer jacket layer is formed around the reinforcement layer by extrusion through an extruder. The outer protective layer can be made of low-smoke halogen-free flame-retardant polyolefin, ceramic refractory materials, ceramic silicon rubber, flame-retardant oxygen-insulating materials and the like.
It will be appreciated that the order of the steps described above may be varied as desired. For example, the central reinforcing unit, the light unit and the filling unit may be manufactured first, or the light unit and the central reinforcing unit and the filling unit may be manufactured first, or the central reinforcing unit, the light unit and the filling unit may be manufactured simultaneously.
In the preparation method of the fire-resistant optical cable 100 and the fire-resistant optical cable, the first nonmetal fire-resistant layer 112, the second nonmetal fire-resistant layer 123 and the third nonmetal fire-resistant layer 132 are arranged in the cable core 10, so that the cable core 10 is well protected from flame retardance; meanwhile, the fire-resistant optical cable has strong electromagnetic interference resistance by adopting an all-dielectric nonmetal structure, and has the advantages of light weight, good toughness, convenience in laying, installation, construction and the like.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications of the above embodiments are within the scope of the disclosure claimed in the present application as long as they are within the spirit and scope of the present application.
Claims (7)
1. The utility model provides a fire-resistant optical cable, includes the cable core and the cladding in the peripheral non-metallic sheath of cable core, its characterized in that, the cable core includes central unit, a plurality of light units and the water blocking layer of strengthening, central unit of strengthening include the reinforcement and the cladding in the first non-metallic flame retardant coating of reinforcement, a plurality of light units are around locating central unit of strengthening is around, and each light unit includes signal transmission piece, the sleeve pipe and the non-metallic flame retardant coating of second of holding signal transmission piece, the water blocking layer cladding in a plurality of light unit are peripheral.
2. The fire resistant optical cable of claim 1, wherein: the second non-metal refractory layer is coated on the periphery of the signal transmission piece.
3. The fire resistant optical cable of claim 1, wherein: the second non-metal refractory layer is coated on the periphery of the sleeve.
4. The fire resistant optical cable of claim 1, wherein: the cable core further comprises a filling unit positioned on the periphery of the central reinforcing unit, the filling unit comprises a filling piece and a third non-metal fire-resistant layer, and the third non-metal fire-resistant layer is coated on the periphery of the filling piece.
5. The fire resistant optical cable of claim 1, wherein: the cable core further comprises a water blocking member disposed between the light unit and the central reinforcing unit.
6. The fire resistant optical cable of claim 1, wherein: the nonmetal sheath comprises an inner sheath layer, an outer sheath layer and a fourth nonmetal fire-resistant layer arranged between the inner sheath layer and the outer sheath layer.
7. The fire resistant optical cable of claim 6, wherein: the non-metallic sheath further comprises an enhancement layer disposed between the fourth non-metallic refractory layer and the outer jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121470167.6U CN215067460U (en) | 2021-06-30 | 2021-06-30 | Fire-resistant optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121470167.6U CN215067460U (en) | 2021-06-30 | 2021-06-30 | Fire-resistant optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215067460U true CN215067460U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121470167.6U Active CN215067460U (en) | 2021-06-30 | 2021-06-30 | Fire-resistant optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215067460U (en) |
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2021
- 2021-06-30 CN CN202121470167.6U patent/CN215067460U/en active Active
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