CN211206890U - Layer-stranded fire-resistant optical cable - Google Patents
Layer-stranded fire-resistant optical cable Download PDFInfo
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- CN211206890U CN211206890U CN201922437199.5U CN201922437199U CN211206890U CN 211206890 U CN211206890 U CN 211206890U CN 201922437199 U CN201922437199 U CN 201922437199U CN 211206890 U CN211206890 U CN 211206890U
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Abstract
The utility model belongs to the technical field of the optical cable technique and specifically relates to a layer stranded fire-resistant optical cable is related to. The method is characterized in that: the cable comprises a cable core, a flame retardant coating, a reinforcing layer, an inner protective layer, a reinforcing layer and an outer protective layer; the cable core is provided with a central reinforcing member and a plurality of optical fiber loose tubes, and the optical fiber loose tubes are twisted around the central reinforcing member to form the cable core; the fire-resistant layer consists of fire-resistant mica tapes; the reinforcing layer is composed of a plurality of glass fiber yarns; the inner protective layer is coated on the outer surface of the reinforcing layer; the reinforced layer consists of a plurality of FRP bars; the outer protective layer is coated on the outer surface of the reinforcing layer. The inner and outer sheath layers of the optical cable are made of high-flame-retardance low-smoke halogen-free materials, so that the optical cable has good flame-retardant property; the optical cable has stronger tensile property and also has the function of preventing the animal from being bitten by teeth; the optical cable is of a double-sheath structure, has excellent lateral pressure resistance, and is suitable for overhead and pipeline laying as well as direct-buried laying; the optical cable adopts the design of an all-dielectric structure, is also suitable for being laid in a strong lightning area or in the same ditch with the cable, and is suitable for various laying occasions.
Description
Technical Field
The utility model relates to an optical cable technical field especially relates to a layer stranded fire-resistant optical cable.
Background
With the arrival of the 5G era, the optical cable can be more widely covered in important engineering facilities such as subways, tunnels and large buildings, and places with dense personnel such as exhibition centers and large supermarkets, and higher requirements are put forward on the flame retardant property under the condition of fire. Meanwhile, whether the communication line is smooth after a fire disaster occurs can be guaranteed, and the device plays an important role in escape and disaster relief of people. Therefore, the fire resistance of the optical cable is greatly regarded, and a high-fire-resistance fire-resistant optical cable is urgently needed to meet the communication stability requirements of specific occasions and ensure that communication is not blocked.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a layer stranded fire-resistant optical cable. The optical cable not only has excellent fire resistance, but also has the function of preventing animal teeth from biting as the optical cable has stronger tensile property due to the reinforcing layer and the reinforcing layer which are formed by the glass fibers in the optical cable; the optical cable is of a double-sheath structure, has excellent lateral pressure resistance, and is suitable for overhead and pipeline laying as well as direct-buried laying; the optical cable adopts the design of an all-dielectric structure, is also suitable for being laid in a strong lightning area or in the same ditch with the cable, and is suitable for various laying occasions.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
layer stranded fire resistant optical cable, its characterized in that: the cable comprises a cable core, a flame retardant coating, a reinforcing layer, an inner protective layer, a reinforcing layer and an outer protective layer; the cable core is provided with a central reinforcing member and a plurality of optical fiber loose tubes, and the optical fiber loose tubes are twisted around the central reinforcing member to form the cable core; the fire-resistant layer consists of fire-resistant mica tapes; the reinforcing layer is composed of a plurality of glass fiber yarns; the inner protective layer is coated on the outer surface of the reinforcing layer; the reinforced layer consists of a plurality of FRP bars; the outer protective layer is coated on the outer surface of the reinforcing layer.
The central reinforcing part adopts non-metal reinforcing parts, such as FRP (fiber reinforced plastic) bars, KFRP (KFRP) bars and the like, and the central reinforcing part can be extruded with a plastic cushion layer outside the non-metal reinforcing parts.
The optical fiber loose tube is formed by extruding crystalline plastics, such as PBT (polybutylene terephthalate), PP (polypropylene) and the like; the optical fiber loose tube contains a water-blocking compound and optical fibers, the number of the optical fibers in each tube is generally 2-12, and the surfaces of the optical fibers are identified by different colors of colored layers.
The fireproof layer is mainly formed by longitudinally wrapping fireproof mica tapes, and cable core water blocking is carried out on the side, close to the cable core, of the fireproof layer through the synchronous longitudinally wrapped water blocking tape.
The reinforcing layer mainly comprises a plurality of glass fiber yarns, and the plurality of glass fiber yarns are wrapped on the outer surface of the fire-resistant layer in a unidirectional twisting mode, so that the optical cable has a strong tensile effect; at least 2 water-blocking yarns are crossly arranged outside the reinforcing layer for water blocking.
The interior sheath pass through extrusion moulding by plastics, the cladding is on the enhancement layer surface, interior sheath chooses for use high fire resistance low smoke halogen-free material.
The reinforcing layer mainly comprises a plurality of flame-retardant FRP bars, the flame-retardant FRP bars are wrapped on the outer surface of the inner protective layer in a unidirectional twisting mode, and at least 2 water-blocking yarns are crossly distributed between the reinforcing layer and the inner protective layer to block water; the reinforced layer is longitudinally coated with a water blocking tape to block water.
The outer jacket is formed by extruding plastic and is coated on the outer surface of the enhancement layer, and the outer jacket is made of high-flame-retardancy low-smoke halogen-free materials.
The scheme is further as follows: tearing ropes are longitudinally arranged between the reinforcing layer and the inner protective layer and between the reinforcing layer and the outer protective layer respectively, so that the sheath layer can be conveniently stripped in construction, and the tearing ropes can be polyester tearing ropes or aramid tearing ropes; the number of the tearing ropes can be 1 or more.
Compared with the prior art, the utility model has the advantages that:
1. the optical cable core is longitudinally coated with the fire-resistant mica tape, and the inner sheath layer and the outer sheath layer are both made of high-flame-retardance low-smoke halogen-free materials, so that the optical cable core has better fire resistance.
2. The optical cable structure possesses enhancement layer and enhancement layer, and constitutes by the glass fiber reinforcement, and the optical cable has stronger tensile strength, possesses the function of preventing that the animal tooth stings again.
3. The optical cable is of a double-sheath structure, has excellent lateral pressure resistance, and is suitable for overhead and pipeline laying as well as direct-buried laying.
4. The optical cable adopts the design of an all-dielectric structure, and can be suitable for being laid in a strong lightning area or in the same ditch with the cable.
5. The optical cable adopts a dry cable core design, so that the water resistance requirement is met, the cleaning time of joints after the optical cable is stripped is further saved, and the optical cable is more environment-friendly.
Description of the drawings: fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
The specific implementation mode is as follows:
the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Referring to fig. 1, which is a schematic view of a preferred embodiment of the present invention, the present invention relates to a layer stranded fire resistant optical cable, which is characterized in that: the cable comprises a cable core 1, a flame retardant coating 2, a reinforcing layer 3, an inner protective layer 4, a reinforcing layer 5 and an outer protective layer 6; the cable core 1 comprises a central reinforcing member 11 and a plurality of optical fiber loose tubes 12, wherein the optical fiber loose tubes 12 are twisted around the central reinforcing member 11 to form the cable core; the fire-resistant layer 2 consists of fire-resistant mica tapes; the reinforcing layer 3 is composed of a plurality of glass fiber yarns; the inner protective layer 4 is coated on the outer surface of the reinforcing layer 3; the reinforcing layer 5 is composed of a plurality of FRP bars; the outer protective layer 6 is coated on the outer surface of the reinforcing layer 5.
As shown in fig. 1, the central reinforcement 11 is made of a non-metal reinforcement, such as an FRP rod, a KFRP rod, etc., and the central reinforcement 11 may further be extruded with a plastic cushion layer outside the non-metal reinforcement.
As shown in fig. 1, the optical fiber loose tube 12 is formed by extrusion molding of crystalline plastic such as PBT (polybutylene terephthalate), PP (polypropylene), etc.; the optical fiber loose tube 12 contains the water-blocking compound 13 and the optical fibers 14, the number of the optical fibers 14 in each tube is generally 2-12, and the surfaces of the optical fibers 14 are identified by different colors of the colored layers.
As shown in fig. 1, the fire-resistant layer 2 is mainly formed by longitudinally wrapping fire-resistant mica tapes, and the cable core water blocking is carried out on the side, close to the cable core, of the fire-resistant layer 2 through the synchronous longitudinally wrapped water blocking tape 21.
As shown in fig. 1, the reinforcing layer 3 is mainly composed of a plurality of glass fiber yarns, and the plurality of glass fiber yarns are wrapped on the outer surface of the fire-resistant layer 2 in a unidirectional twisting manner, so that the optical cable has a strong tensile effect; at least 2 water-blocking yarns 31 are crossly arranged outside the reinforcing layer 3 for water blocking.
Figure 1 shows, interior sheath 4 pass through extrusion moulding by plastics, the cladding is on 3 surfaces of enhancement layer, interior sheath 4 chooses for use high fire resistance low smoke halogen-free material.
As shown in fig. 1, the reinforcing layer 5 mainly comprises a plurality of flame-retardant FRP rods, the flame-retardant FRP rods are wrapped around the outer surface of the inner protective layer 4 in a unidirectional twisting manner, and at least 2 water-blocking yarns 51 are crossly laid between the reinforcing layer 5 and the inner protective layer 4 for water blocking; the reinforcing layer is longitudinally wrapped with a water blocking tape 52 to block water.
Fig. 1 shows, outer jacket 6 pass through extrusion moulding by plastics, the cladding is on 5 surfaces of enhancement layer, outer jacket 6 chooses for use high fire-retardant low smoke halogen-free material.
As shown in fig. 1, the above scheme further comprises: the tearing ropes 7 are longitudinally arranged between the reinforcing layer 3 and the inner protective layer 4 and between the reinforcing layer 5 and the outer protective layer 6 respectively, so that the construction stripping of the sheath layer is facilitated, and the tearing ropes 7 can be polyester tearing ropes or aramid tearing ropes; the number of the tearing ropes can be 1 or more.
Compared with the prior art, the utility model has the advantages that:
1. the optical cable core is longitudinally coated with the fire-resistant mica tape, and the inner sheath layer and the outer sheath layer are both made of high-flame-retardance low-smoke halogen-free materials, so that the optical cable core has better fire resistance.
2. The optical cable structure possesses enhancement layer and enhancement layer, and constitutes by the glass fiber reinforcement, and the optical cable has stronger tensile strength, possesses the function of preventing that the animal tooth stings again.
3. The optical cable is of a double-sheath structure, has excellent lateral pressure resistance, and is suitable for overhead and pipeline laying as well as direct-buried laying.
4. The optical cable adopts the design of an all-dielectric structure, and can be suitable for being laid in a strong lightning area or in the same ditch with the cable.
5. The optical cable adopts a dry cable core design, so that the water resistance requirement is met, the cleaning time of joints after the optical cable is stripped is further saved, and the optical cable is more environment-friendly.
Of course, the present invention has been described in detail with reference to the embodiments, and only for the purpose of illustrating the technical conception and the features of the present invention, the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and implement the same, therefore, all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (9)
1. A layer stranded fire resistant optical cable, characterized in that: the cable comprises a cable core (1), a flame retardant coating (2), a reinforcing layer (3), an inner protective layer (4), a reinforcing layer (5) and an outer protective layer (6); the cable core (1) is provided with a central reinforcing piece (11) and a plurality of optical fiber loose tubes (12), and the optical fiber loose tubes (12) are twisted around the central reinforcing piece (11) to form the cable core; the fire-resistant layer (2) is composed of fire-resistant mica tapes; the reinforcing layer (3) is composed of a plurality of glass fiber yarns; the inner protective layer (4) is coated on the outer surface of the reinforcing layer (3); the reinforcing layer (5) consists of a plurality of FRP bars; the outer protective layer (6) is coated on the outer surface of the reinforcing layer (5).
2. A layer stranded fire resistant optical cable according to claim 1, wherein: the central reinforcing part (11) adopts a non-metal reinforcing part, or a plastic cushion layer is extruded outside the non-metal reinforcing part.
3. A layer stranded fire resistant optical cable according to claim 1, wherein: the optical fiber loose tube (12) is formed by crystalline plastic through extrusion; the optical fiber loose tube (12) contains a water-blocking compound (13) and optical fibers (14), the number of the optical fibers (14) in each tube is generally 2-12, and the surfaces of the optical fibers (14) are identified by different colors of colored layers.
4. A layer stranded fire resistant optical cable according to claim 1, wherein: the fire-resistant layer (2) is mainly formed by longitudinally wrapping fire-resistant mica tapes, and the fire-resistant layer (2) is close to the cable core side to perform cable core water blocking through the synchronous longitudinally wrapped water blocking tape (21).
5. A layer stranded fire resistant optical cable according to claim 1, wherein: the reinforced layer (3) mainly comprises a plurality of glass fiber yarns, the glass fiber yarns are wrapped on the outer surface of the fire-resistant layer (2) in an unidirectional twisting mode, and at least 2 water-blocking yarns (31) are crossly arranged outside the reinforced layer (3) for blocking water.
6. A layer stranded fire resistant optical cable according to claim 1, wherein: interior sheath (4) pass through extrusion moulding by plastics, the cladding is on enhancement layer (3) surface, interior sheath (4) select for use high fire resistance low smoke halogen-free material.
7. A layer stranded fire resistant optical cable according to claim 1, wherein: the reinforcing layer (5) mainly comprises a plurality of flame-retardant FRP bars, the flame-retardant FRP bars are wrapped on the outer surface of the inner protective layer (4) in a unidirectional twisting mode, and at least 2 water-blocking yarns (51) are crossly distributed between the reinforcing layer (5) and the inner protective layer (4) for water blocking; the reinforced layer is longitudinally wrapped with a water blocking tape (52) to block water.
8. A layer stranded fire resistant optical cable according to claim 1, wherein: outer jacket (6) pass through extrusion moulding by plastics, the cladding is on enhancement layer (5) surface, outer jacket (6) select for use high fire resistance low smoke halogen-free material.
9. A layer stranded fire resistant optical cable according to claim 1, wherein: in the scheme, tearing ropes (7) are respectively and longitudinally arranged between the reinforcing layer (3) and the inner protective layer (4) and between the reinforcing layer (5) and the outer protective layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922437199.5U CN211206890U (en) | 2019-12-30 | 2019-12-30 | Layer-stranded fire-resistant optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922437199.5U CN211206890U (en) | 2019-12-30 | 2019-12-30 | Layer-stranded fire-resistant optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211206890U true CN211206890U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922437199.5U Active CN211206890U (en) | 2019-12-30 | 2019-12-30 | Layer-stranded fire-resistant optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211206890U (en) |
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2019
- 2019-12-30 CN CN201922437199.5U patent/CN211206890U/en active Active
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