CN210442553U - All-dielectric central beam tube type rat-proof termite-proof lightning-proof optical cable - Google Patents
All-dielectric central beam tube type rat-proof termite-proof lightning-proof optical cable Download PDFInfo
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- CN210442553U CN210442553U CN201921835508.8U CN201921835508U CN210442553U CN 210442553 U CN210442553 U CN 210442553U CN 201921835508 U CN201921835508 U CN 201921835508U CN 210442553 U CN210442553 U CN 210442553U
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Abstract
The utility model provides a full medium center beam tube formula protection against rodents prevents ant lightning protection optical cable, it can be used to the mouse harm, the more serious area of ant harm, guarantees the sufficient life of optical fiber cable. The optical fiber cable comprises an outer sheath, a middle sheath, a glass fiber belt layer, an inner sheath, a glass fiber yarn layer and a loose tube, wherein the outer sheath, the middle sheath, the glass fiber belt layer, the inner sheath, the glass fiber yarn layer and the loose tube are sequentially arranged from outside to inside, optical fibers are arranged in an inner cavity of the loose tube, fiber paste is filled in spaces of inner walls of the optical fibers and the loose tube, glass fiber yarns wrap the periphery of the loose tube to form the glass fiber yarn layer, and the glass fiber belt wraps the periphery of the inner sheath to form the glass fiber belt layer.
Description
Technical Field
The utility model relates to a technical field of photoelectric composite cable structure specifically is a full medium center beam tube formula protection against rodents prevents ant lightning protection optical cable.
Background
With the continuous development of optical cable technology, optical cables are increasingly applied to various complex indoor application scenes. Due to the special laying scene, the material selection of the optical cable also needs to be considered specially. The optical cable is required to have enough rat-proof and termite-proof strength, so that the phenomenon that the optical cable is damaged by biting is reduced, and the enough service life of the optical cable is ensured.
At present, the central beam tube type rat-proof and termite-proof optical cable mainly adopts non-metal reinforced yarns, non-metal reinforced belts or metal steel belt armoring, the structure has certain rat-proof and termite-proof performance, but the non-metal structural performance is limited, the cable is easy to be damaged by nibbling in serious zones of rat damage and termite damage, the service life is limited, and meanwhile, the metal armoring structure is easy to introduce thunder and lightning damage and has poor safety.
Disclosure of Invention
To the above problem, the utility model provides an all-dielectric center beam tube type protection against rodents prevents ant lightning protection optical cable, it can be used to the mouse harm, the more serious area of ant harm, guarantees the sufficient life of fiber optic cable.
The utility model provides a novel indoor for wireless distribution system photoelectric composite cable which characterized in that: the optical fiber cable comprises an outer sheath, a middle sheath, a glass fiber belt layer, an inner sheath, a glass fiber yarn layer and a loose tube, wherein the outer sheath, the middle sheath, the glass fiber belt layer, the inner sheath, the glass fiber yarn layer and the loose tube are sequentially arranged from outside to inside, optical fibers are arranged in an inner cavity of the loose tube, fiber paste is filled in spaces of inner walls of the optical fibers and the loose tube, glass fiber yarns wrap the periphery of the loose tube to form the glass fiber yarn layer, and the glass fiber belt wraps the periphery of the inner sheath to form the glass fiber belt layer.
It is further characterized in that:
the fiber paste filled in the loose tube is water-blocking fiber paste;
the thickness of the single side of the glass fiber yarn layer is 0.3 mm-0.8 mm;
the glass fiber yarns of the glass fiber yarn layer adopt water-blocking yarns so as to meet the water seepage requirement of the optical cable;
the single-side thickness of the inner sheath is 0.8 mm-1.2 mm, and the material of the inner sheath is specifically high-density polyethylene, medium-density polyethylene or linear low-density polyethylene;
the inner sheath is provided with a first tearing rope twisted by aramid fiber and polyester yarn;
at least two water-blocking yarns are arranged on the outer surface of the inner sheath in a crossed mode, the density of the water-blocking yarns is 400-1000 dtex, and the longitudinal water-blocking performance of the optical cable is met;
the thickness of the single side of the glass fiber belt layer is 0.3 mm-0.8 mm;
the single-side thickness of the middle sheath is 1.2 mm-1.5 mm, the middle sheath is made of high-density polyethylene, medium-density polyethylene or linear low-density polyethylene, and a second tearing rope twisted by aramid fibers is arranged on the middle sheath;
the single-side thickness of the outer sheath is 0.5 mm-0.6 mm, and the outer sheath is made of nylon.
A preparation process of a rat-proof, ant-proof and lightning-proof optical cable is characterized by comprising the following steps: the optical fiber is colored, then plastic sheathing and fiber paste filling are carried out to form a loose tube, then two processes of forming a glass fiber yarn layer and an inner sheath by wrapping glass fiber yarns are carried out synchronously, then a double-layer co-extrusion process of longitudinally wrapping a glass fiber belt layer and a middle sheath and an outer sheath is carried out synchronously, and then the optical cable is packaged and delivered out of a factory after the detection is qualified.
It is further characterized in that: the excess length of the optical fiber in the plastic sheathing process is controlled according to (0.5-1.0) ± 0.3 ‰;
in the production process of the inner sheath procedure, the sleeve is paid off by constant paying-off tension, and the control of the excess length of the finished optical cable is more than or equal to 3-7 per mill;
a water-blocking yarn cross winding device is arranged between the inner sheath and the glass fiber belt layer, so that at least two water-blocking yarns are arranged on the outer surface of the inner sheath in a cross mode;
the outer surface of the glass fiber belt is adhered with enough glue to be tightly adhered with the middle sheath;
the cover pipe is outward around putting the waterproofing type glass fiber yarn of a certain amount, and extrusion molding polyethylene simultaneously need guarantee that glass fiber yarn cladding is even and the circularity of interior back external diameter of protecting, adopts invariable glass fiber tape unwrapping wire tension, selects suitable interior protection unwrapping wire tension and glass fiber tape size, guarantees that glass fiber tape indulges the package shaping circularity and does not form the overlap joint. In the double-layer co-extrusion process, the outer protective nylon layer and the polyethylene layer need to be tightly combined, and are not layered after being extruded, so that the roundness of the total thickness and the outer diameter of the optical cable is met;
the double-layer co-extrusion process specifically comprises the steps that the middle sheath and the outer sheath are co-extruded in a double-layer mode by adopting high-density polyethylene and nylon, the nylon material is dried before use, the drying temperature is 100 ℃, the time is at least 2 hours, a drying box needs to be cleaned up before the material is dried, if a cable surface has small air holes in production, the nylon material needs to be dried again, the polyethylene material is added with an adhesive during production, the polyethylene and the nylon are tightly bonded, the adhesive also needs to be dried before use, the fact that the material is fully dried is guaranteed, a mixer needs to be cleaned up before mixing, cross material pollution is prevented, and the temperature of each area in the co-extrusion process is that: zone 1, 215 ℃; zone 2, 220 ℃; zone 3, 230 ℃; zone 4, 240 ℃; zone 5, 250 ℃; an extruder, 255 ℃; die orifice, 255 ℃.
After the utility model is adopted, the three-sheath all-dielectric structure is adopted, the glass fiber yarn and glass fiber belt double-layer armor structure is adopted, the all-dielectric nonmetal protective layer with enough strength is formed, and meanwhile, the glass fiber yarn can also improve the tensile strength of the optical cable; the outer sheath adopts a nylon protective layer, has high hardness and smooth appearance, has the effects of multi-layer rat and termite prevention, and is small in outer diameter and beneficial to construction and maintenance; the glass fiber belt is formed by knitting and weaving glass fiber roving or bulked glass fiber yarn, has thicker thickness, has the superior performances of light weight, high strength, high temperature resistance, insulation, heat insulation and flame retardance, stabs the oral cavity of a mouse through the glass fiber in the using process, and has the function of rat prevention; in addition, the smooth nylon outer protective material has higher hardness, increases the biting difficulty of rodents and ants, and further enhances the protective capability of the optical cable; when the optical cable is laid in a rat damage and ant damage area, the double-layer armor layer and the three-layer sheath layer of the optical cable play a role in preventing rats and ants, so that the cable core is protected from being damaged, the optical fiber is protected from being damaged, the optical cable can be used in a region with serious rat damage and ant damage, and the sufficient service life of the optical fiber cable is ensured.
Drawings
Fig. 1 is a schematic cross-sectional structural view of an optical cable according to the present invention;
fig. 2 is a schematic block diagram of a process flow of the optical cable of the present invention;
the names corresponding to the sequence numbers in fig. 2 are as follows:
the optical fiber cable comprises an outer sheath 1, a middle sheath 2, a glass fiber tape layer 3, an inner sheath 4, a glass fiber yarn layer 5, a loose tube 6, an optical fiber 7 and fiber paste 8.
Detailed Description
A novel indoor wireless is compound cable of photoelectricity for distribution system, sees figure 1: the optical fiber cable comprises an outer sheath 1, a middle sheath 2, a glass fiber belt layer 3, an inner sheath 4, a glass fiber yarn layer 5 and a loose tube 6 which are sequentially arranged from outside to inside, wherein the cross section of the outer sheath is in a circular ring shape, an optical fiber 7 is arranged in an inner cavity of the loose tube 6, the space of the inner walls of the optical fiber 7 and the loose tube 6 is filled with a fiber paste 8, the glass fiber yarn winds the periphery of the loose tube to form the glass fiber yarn layer 5, and the glass fiber belt winds the periphery of the inner sheath to form the glass fiber belt layer 3.
The fiber 8 paste filled in the loose tube 6 is water-blocking fiber paste;
the unilateral thickness of the glass fiber yarn layer 5 is 0.3 mm-0.8 mm;
the glass fiber yarns of the glass fiber yarn layer 5 adopt water-blocking yarns so as to meet the water seepage requirement of the optical cable;
the thickness of the single side of the inner sheath 4 is 0.8 mm-1.2 mm, and the material of the inner sheath 4 is specifically high-density polyethylene, medium-density polyethylene or linear low-density polyethylene;
the inner sheath 4 is provided with a first tearing rope twisted by aramid fiber and polyester yarn;
at least two water-blocking yarns are crossly arranged on the outer surface of the inner sheath 4, the density of the water-blocking yarns is 400-1000 dtex, and the longitudinal water-blocking performance of the optical cable is met;
the thickness of the single side of the glass fiber belt layer 3 is 0.3 mm-0.8 mm;
the single-side thickness of the middle sheath 2 is 1.2 mm-1.5 mm, the material of the middle sheath 2 is specifically high-density polyethylene, medium-density polyethylene or linear low-density polyethylene, and the middle sheath is provided with a second tearing rope twisted by aramid fibers;
the unilateral thickness of the outer sheath 1 is 0.5 mm-0.6 mm, and the material of the outer sheath 1 is nylon.
The optical cable adopts a three-sheath all-dielectric structure, adopts a glass fiber yarn and glass fiber tape double-layer armor structure to form an all-dielectric nonmetal protective layer with enough strength, and simultaneously, the glass fiber yarn can also improve the tensile strength of the optical cable; the outer sheath adopts a nylon protective layer, has high hardness and smooth appearance, has the effects of multi-layer rat and termite prevention, and is small in outer diameter and beneficial to construction and maintenance; the glass fiber belt is formed by knitting and weaving glass fiber roving or bulked glass fiber yarn, has thicker thickness, has the superior performances of light weight, high strength, high temperature resistance, insulation, heat insulation and flame retardance, stabs the oral cavity of a mouse through the glass fiber in the using process, and has the function of rat prevention; in addition, the smooth nylon outer protective material has higher hardness, increases the biting difficulty of rodents and ants, and further enhances the protective capability of the optical cable; when the optical cable is laid in a rat damage and ant damage area, the double-layer armor layer and the three-layer sheath layer of the optical cable play a role in preventing rats and ants, so that the cable core is protected from being damaged, the optical fiber is protected from being damaged, the optical cable can be used in a region with serious rat damage and ant damage, and the sufficient service life of the optical fiber cable is ensured.
A preparation process of the rat-proof, ant-proof and lightning-proof optical cable is shown in figure 2: the optical fiber is colored, then plastic sheathing and fiber paste filling are carried out to form a loose tube, then two processes of forming a glass fiber yarn layer and an inner sheath by wrapping glass fiber yarns are carried out synchronously, then a double-layer co-extrusion process of longitudinally wrapping a glass fiber belt layer and a middle sheath and an outer sheath is carried out synchronously, and then the optical cable is packaged and delivered out of a factory after the detection is qualified.
The excess length of the optical fiber in the plastic sheathing process is controlled according to (0.5-1.0) ± 0.3 ‰;
in the production process of the inner sheath procedure, the sleeve is paid off by constant paying-off tension, and the control of the excess length of the finished optical cable is more than or equal to 3-7 per mill;
a water-blocking yarn cross winding device is arranged between the inner sheath and the glass fiber belt layer, so that at least two water-blocking yarns are arranged on the outer surface of the inner sheath in a cross mode;
the outer surface of the glass fiber belt is adhered with enough glue to be tightly adhered with the middle sheath;
the cover pipe is outward around putting the waterproofing type glass fiber yarn of a certain amount, and extrusion molding polyethylene simultaneously need guarantee that glass fiber yarn cladding is even and the circularity of interior back external diameter of protecting, adopts invariable glass fiber tape unwrapping wire tension, selects suitable interior protection unwrapping wire tension and glass fiber tape size, guarantees that glass fiber tape indulges the package shaping circularity and does not form the overlap joint. In the double-layer co-extrusion process, the outer protective nylon layer and the polyethylene layer need to be tightly combined, and are not layered after being extruded, so that the roundness of the total thickness and the outer diameter of the optical cable is met;
the double-layer co-extrusion process is particularly a middle sheath, the outer sheath synchronously adopts high-density polyethylene and nylon double-layer co-extrusion, the nylon material is dried before use, the drying temperature is 100 ℃, the time is at least 2 hours, and the material drying box is required to be cleaned up before drying, if a cable surface has small air holes in production, the nylon material is dried again, the polyethylene material is added with an adhesive during production, the polyethylene and the nylon are tightly bonded, the adhesive is also dried before use, the full drying is ensured, a clean stirring machine is required before mixing, the cross material pollution is prevented, the temperature of each area in the co-extrusion process is: zone 1, 215 ℃; zone 2, 220 ℃; zone 3, 230 ℃; zone 4, 240 ℃; zone 5, 250 ℃; an extruder, 255 ℃; die orifice, 255 ℃.
The process has the following beneficial effects:
1. controlling the stability of the excess length of the optical fiber of the optical cable: the extra length of the optical fiber in the plastic sheathing process is controlled according to (0.5-1.0) ± 0.3 thousandths, and in the production process of the inner protection process, the sleeve is paid off by adopting constant paying-off tension, so that the control of the extra length of the finished optical cable is ensured to be more than or equal to 3-7 thousandths.
2. The longitudinal water permeability of the optical cable is as follows: adopt the waterproofing type glass fiber yarn between sleeve pipe and the interior sheath, set up a yarn that blocks water and alternately wind around putting the device between interior sheath and glass fiber band, simultaneously because glass fiber band external surface has sufficient glue to adhere to, can make it inseparable with the adhesion of outer sheath, guarantee that optical cable infiltration performance satisfies the standard requirement, also improved the waterproof performance of optical cable simultaneously, be favorable to prolonging the life of optical cable.
3. Controlling the loose tube outer ring and the double-layer co-extrusion process: the waterproofing type glass fiber yarn of putting a certain amount is put around to the pine sleeve pipe outward, extrusion molding polyethylene simultaneously, need to guarantee the circularity of the glass fiber yarn cladding external diameter after even and interior protection, through adopting invariable glass fiber tape unwrapping wire tension, select suitable interior protection unwrapping wire tension and glass fiber tape size, guarantee that glass fiber tape indulges the package shaping circularity and does not form the overlap joint, in double-deck crowded technology altogether, the restrictive coating needs to combine closely in nylon oversheath layer and the polyethylene, extrude the back and do not stratify, with this circularity that satisfies optical cable gross thickness and external diameter.
The novel concept is provided for the development of other types of all-dielectric central beam tube type high-strength rat-proof, termite-proof and lightning-proof optical cables; the small-core-number high-strength rat-proof, termite-proof and lightning-proof optical cable is proved to be realized by adopting a central beam tube type light all-dielectric structure; the structure meets the requirements of all-performance tests such as stretching, water seepage and the like of optical cable pipelines and field overhead use and the basic test performance of optical fiber cables; providing directions for other high strength type cable products.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides an all-dielectric center beam tube formula protection against rodents prevents ant lightning protection optical cable which characterized in that: the optical fiber cable comprises an outer sheath, a middle sheath, a glass fiber belt layer, an inner sheath, a glass fiber yarn layer and a loose tube, wherein the outer sheath, the middle sheath, the glass fiber belt layer, the inner sheath, the glass fiber yarn layer and the loose tube are sequentially arranged from outside to inside, optical fibers are arranged in an inner cavity of the loose tube, fiber paste is filled in spaces of inner walls of the optical fibers and the loose tube, glass fiber yarns wrap the periphery of the loose tube to form the glass fiber yarn layer, and the glass fiber belt wraps the periphery of the inner sheath to form the glass fiber belt layer.
2. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the thickness of the single side of the glass fiber yarn layer is 0.3 mm-0.8 mm.
3. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the glass fiber yarns of the glass fiber yarn layer are water blocking yarns.
4. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the thickness of the single side of the inner sheath is 0.8 mm-1.2 mm.
5. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the inner sheath is provided with a first tearing rope twisted by aramid fiber and polyester yarn.
6. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: at least two water blocking yarns are arranged on the outer surface of the inner sheath in a crossed mode, and the density of the water blocking yarns is 400-1000 dtex.
7. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the thickness of the single side of the glass fiber belt layer is 0.3 mm-0.8 mm.
8. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the single-side thickness of the middle sheath is 1.2 mm-1.5 mm.
9. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the middle sheath is provided with a second tearing rope twisted by aramid fiber.
10. The all-dielectric central beam tube type rat-proof ant-proof lightning-proof optical cable according to claim 1, wherein: the single-side thickness of the outer sheath is 0.5 mm-0.6 mm, and the outer sheath is made of nylon.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110727071A (en) * | 2019-10-29 | 2020-01-24 | 江苏亨通光电股份有限公司 | All-dielectric central beam tube type rat-proof termite-proof lightning-proof optical cable and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110727071A (en) * | 2019-10-29 | 2020-01-24 | 江苏亨通光电股份有限公司 | All-dielectric central beam tube type rat-proof termite-proof lightning-proof optical cable and preparation process thereof |
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