A rodent-proof optical cable and a method for manufacturing the same

Abstract

The present invention provides a rodent-proof optical cable and a manufacturing method thereof, which relates to the technical field of manufacturing rodent-proof optical cables, and adds fixing measures to the structure to prevent the overlap of the steel belt armor layer of GYTS and GYTS04 optical cables from being peeled off by rodents. The rodent-proof optical cable comprises a polymer jacket, a corrugated plastic-coated steel belt, a binding steel wire, a cable core, a bonding hole and a steel belt overlap seam. The present invention simplifies the protective measures for preventing rodents from biting off optical fibers when the optical cable is aerially laid, simplifies the installation, protection, maintenance, etc. of the optical cable, and reduces the production and use costs.

Description

Technical Field

[0001] The invention relates to the technical field of rodent-proof optical cable manufacturing, and in particular to a rodent-proof optical cable and a manufacturing method thereof. Background Art

[0002] The construction of optical fiber communication network requires a large number of optical cable products with various performances. The environment for installing outdoor optical cable lines is ever-changing, which puts forward special requirements for the design and processing of optical cables. At present, there are many cases where optical cables are laid overhead through mountainous forest areas. During the installation and use of optical fiber cables, the laying path is tortuous and the optical cable is in a bent state. For commonly used steel belt armored optical cables such as GYTS type and GYTS04 type, the stress formed in the bending state can easily cause the inner and outer layers of the steel belt lap joint to separate. The key is that the optical cable installed in mountainous forest areas is easily damaged by rodents. After the outer PE sheath is gnawed off by rodents, the armored steel belt lap joint is separated. Rodents can easily peel off the steel belt lap joint. The optical cable core will lose the protection of the steel belt armor and be bitten by rodents. The optical fiber loss in the optical cable increases or is directly bitten off, causing communication safety accidents and major losses.

[0003] In the case of optical cables being attacked by rodents, the typical protective measures taken by all parties are as follows: adding external protective covers to key areas of the optical cable line to prevent rodent attacks; adding double armor layers to the optical cable structure to prevent rodents from gnawing on the cable core; adding bio-repellent substances to the optical cable sheath to prevent rodents from approaching; using electromagnetic / electroacoustic technology to drive away rodents; the above protective measures increase construction and maintenance costs, or are technically complex, or pose safety risks to people, or have high product costs. Summary of the invention

[0004] The object of the present invention is to provide a rodent-proof optical cable, which adds a binding wire and bonding holes to the structure of GYTS and GYTS04 optical cables, and adopts a corrugated plastic-coated steel belt. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] The present invention provides a rodent-proof optical cable, comprising a cable core, a corrugated plastic-coated steel belt, a polymer outer jacket, and a steel belt lap joint; wherein:

[0007] Optionally or preferably, the cable core comprises a reinforcing core, an optical fiber, a sleeve and a binding yarn;

[0008] Optionally or preferably, the sleeve is arranged around the reinforcing core;

[0009] Optionally or preferably, the binding yarn is provided with an embossed plastic-coated steel belt;

[0010] Optionally or preferably, the outer layer of the corrugated plastic-coated steel strip is wrapped with a tying steel wire;

[0011] Optionally or preferably, the outer layer of the steel belt lap seam of the embossed plastic-coated steel belt is provided with bonding holes;

[0012] Optionally or preferably, the polymer jacket is wrapped around the outer layer of the corrugated plastic-coated steel belt.

[0013] Optionally or preferably, the cable core further comprises a possible filler, which is also arranged around the reinforcing core.

[0014] Optionally or preferably, the bonding hole may be circular or elliptical, and the diameter of the bonding hole is 0.8-1.2 mm.

[0015] Optionally or preferably, one or both sides of the embossed plastic-coated steel strip are coated with a film that can be thermally bonded to the polymer jacket.

[0016] Optionally or preferably, the binding wire may be a single-strand steel wire or a double-strand steel wire.

[0017] Optionally or preferably, the pitch of the single-strand steel wire winding is 20-60 mm; the pitch of the double-strand steel wire winding is 40-120 mm; and the spacing between adjacent steel wires when the double-strand steel wire is wound is 20-60 mm.

[0018] Optionally or preferably, optionally or preferably, the outer diameter of the binding wire is 0.12-0.25 mm.

[0019] Optionally or preferably, the binding steel wire can be made of stainless steel wire, or steel wire with a phosphating surface, steel wire coated with an anti-corrosion resin, galvanized, nickel-plated, copper-plated steel wire, etc.

[0020] Optionally or preferably, the corrugated plastic-coated steel strip is rolled into a corrugated shape, and the corrugation depth of the corrugated plastic-coated steel strip is 0.4 to 0.6 mm.

[0021] Based on the above technical solution, the following technical effects can be produced:

[0022] A rodent-proof optical cable provided in an embodiment of the present invention is suitable for optical cable routes set up in the wild. A rodent-proof optical cable of the present invention is provided with a corrugated plastic-coated steel belt, and a film that can be thermally bonded to a polymer jacket is coated on the steel belt. Adhesion holes are provided on the outer layer of the steel belt lap seam of the corrugated plastic-coated steel belt, and a binding steel wire is wrapped around the outer layer of the corrugated plastic-coated steel belt to improve the overall tightness and anti-peeling strength of the optical cable. The present invention has a simple structure, and is a protective measure to prevent rodents from biting off optical fibers when used in an overhead laying application, simplifies the installation, protection, and maintenance of optical cables, and reduces production and use costs.

[0023] The present invention also provides a method for manufacturing a rodent-proof optical cable, which is suitable for manufacturing an optical cable suitable for laying in the wild. By using a corrugated plastic-coated steel belt with holes and winding a steel wire around the corrugated plastic-coated steel belt, the difficulty of preventing the optical cable from being peeled off is increased, the maintenance interval within the service life of the optical cable is extended, the difficulty of installing and maintaining the optical cable line is reduced, labor is reduced, and costs are reduced.

[0024] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0025] A method for manufacturing a rodent-proof optical cable, characterized in that it includes: optical fiber coloring, secondary casing, SZ twisting into cable, longitudinal wrapping with hole-shaped plastic-coated steel belt, winding steel wire, melt extrusion coating and finished optical cable; the steps are as follows:

[0026] S1 Fiber coloring, coloring the optical fiber;

[0027] S2 secondary sleeve, used to coat the colored optical fiber;

[0028] S3 SZ stranding and cabling, using a stranding and cabling machine to cable the optical fiber after the casing treatment;

[0029] S4 Longitudinally wrapped with plastic-coated steel tape with holes, the cable core after cabling is longitudinally wrapped with plastic-coated steel tape with holes;

[0030] S5: After wrapping the plastic-coated steel belt with holes longitudinally, use the binding wire to wrap it;

[0031] S6 melt extrusion coating, after winding is completed, use an extrusion die for extrusion coating;

[0032] S7 finished fiber optic cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of one side of an embodiment of the present invention;

[0035] Figure 2 is a structural schematic diagram of another side of an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the structure of the extrusion die used in the present invention;

[0037] In the figure: 1. reinforcing core; 2. optical fiber; 3. casing; 4. binding yarn; 5. winding steel wire; 6. corrugated plastic-coated steel belt; 7. polymer jacket; 8. steel belt lap seam; 9. bonding hole. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0040] like Figure 1-3 As shown:

[0041] The present invention provides a rodent-proof optical cable, comprising a cable core, a corrugated plastic-coated steel belt 6, a polymer jacket 7, and a steel belt lap seam 8; wherein:

[0042] The cable core comprises a reinforcing core 1, an optical fiber 2, a sleeve 3 and a binding yarn 4;

[0043] The sleeve 3 is arranged around the reinforcing core 1;

[0044] The binding yarn 4 is provided with an embossed plastic-coated steel belt 6;

[0045] The outer layer of the corrugated plastic-coated steel belt 6 is wrapped with a binding steel wire 5;

[0046] The outer layer of the steel belt lap seam 8 of the embossed plastic-coated steel belt 6 is provided with bonding holes 9;

[0047] The polymer jacket 7 is wrapped around the outer layer of the corrugated plastic-coated steel belt 7 .

[0048] As an optional implementation, the bonding hole 9 may be circular or elliptical, and the diameter of the bonding hole 9 is 0.8-1.2 mm.

[0049] As an optional implementation, one or both sides of the corrugated plastic-coated steel belt 6 are coated with a film that can be thermally bonded to the polymer jacket 7. The corrugated plastic-coated steel belt 6 and the polymer jacket 7 form a whole with strong bonding force, thereby enhancing the resistance of the optical cable sheath to external forces.

[0050] As an optional implementation, the binding wire 5 can be a single-strand steel wire or a double-strand steel wire.

[0051] As an optional implementation, the pitch of the single-strand steel wire winding is 20-60 mm; the pitch of the double-strand steel wire winding is 40-120 mm; and the spacing between adjacent steel wires when the double-strand steel wire is wound is 20-60 mm.

[0052] As an optional implementation, the outer diameter of the binding wire 5 is 0.12-0.25 mm.

[0053] As an optional implementation, the binding steel wire 5 can be made of stainless steel wire, or steel wire with a phosphating surface, steel wire coated with an anti-corrosion resin, galvanized, nickel-plated, copper-plated steel wire, etc.

[0054] As an optional implementation, the corrugated plastic-coated steel strip 6 is rolled into a corrugated shape; the corrugation depth of the corrugated plastic-coated steel strip 6 is 0.4-0.6 mm.

[0055] As an optional implementation, the preferred value of the winding pitch of the single-strand steel wire or double-strand steel wire is 46-54 mm; the preferred value of the spacing between adjacent steel wires is 46-54 mm; this not only ensures the anti-peeling strength of the steel belt lap seam 8, but also takes into account the product production speed and the speed adaptability of the dedicated steel wire winding equipment.

[0056] As an optional implementation, the winding steel wire is preferably made of stainless steel wire, and the outer diameter of the steel wire is preferably 0.2 mm, which can not only ensure the overall technical reliability of the winding process during the product production process, but also ensure that the peeling force at the lap seam 8 of the steel strip is not less than 10N with the assistance of the winding steel wire.

[0057] As an optional implementation, each of the bonding holes 9 has a certain spacing.

[0058] As an optional implementation, the outer layer of the steel belt lap seam 8 of the embossed plastic-coated steel belt 6 is provided with bonding holes 9; the formed steel belt wraps the cable core and enters the polymer jacket 7 melt extrusion mold, and the polymer jacket 7 melt is injected into the hole pattern under the action of the high extrusion pressure, and the polymer jacket 7 melt is bonded to the inner layer of the steel belt coating film. After cooling and shaping, the inner and outer layers of the polymer-bonded steel belt lap seam 8 in the hole pattern of the outer layer bonding hole 6 are overlapped to form a rivet structure, thereby enhancing the structural strength of the steel belt lap seam 8. Moreover, the polymer in the hole pattern is not easily gnawed by rodents. When the optical cable is damaged by rodents, the rivet structure formed by the steel belt lap seam 8 can resist further damage by rodents.

[0059] As an optional implementation method, the corrugated plastic-coated steel strip 6 is spirally wrapped around the winding steel wire 5 after longitudinal wrapping, and the winding steel wire 5 and the corrugated plastic-coated steel strip then enter the molten extrusion mold to be coated with the plastic outer sheath. The molten plastic has a certain pressure that can completely cover the winding steel wire and the corrugated plastic-coated steel strip without any gaps, thereby ensuring that the sheath structure meets the product standard requirements.

[0060] The present invention also provides a method for manufacturing a rodent-proof optical cable, including optical fiber coloring, secondary casing, SZ twisting into a cable, longitudinally wrapping a hole-shaped plastic-coated steel belt, wrapping a steel wire, melt extrusion coating, and producing a finished optical cable; the steps are as follows:

[0061] S1 Fiber coloring, coloring the optical fiber;

[0062] S2 secondary sleeve, used to coat the colored optical fiber;

[0063] S3 SZ stranding and cabling, using a stranding and cabling machine to cable the optical fiber after the casing treatment;

[0064] S4 longitudinally wrapped with plastic-coated steel tape with holes, the plastic-coated steel tape with holes is longitudinally wrapped outside the cable core after the cabling process;

[0065] S5: After wrapping the plastic-coated steel belt with holes longitudinally, use the binding wire to wrap it;

[0066] S6 melt extrusion coating, after winding is completed, use an extrusion die for extrusion coating;

[0067] S7 finished fiber optic cable.

[0068] As an optional implementation, when the hole-embossed plastic-coated steel strip is longitudinally wrapped, the sizing length of the mold needs to be appropriately reduced to prevent the strip from breaking or warping.

[0069] As an optional implementation, the melt extrusion coating die is a plastic extrusion processing extrusion die, and the molten plastic can be squeezed into the hole to form a plastic bond at the steel belt overlap seam 8, so that the steel belt overlap seam 8 is not easy to separate.

[0070] As an optional embodiment, the equipment for tying the steel wire is a coaxial wire winding and bundling machine.

[0071] As an optional implementation method, the longitudinally wrapped hole-shaped corrugated plastic-coated steel belt is wrapped with steel wire and then melt-extruded and coated. The corrugated plastic-coated steel belt 6 and the wrapped steel wire 5 are bonded to form a whole with the plastic. The steel belt lap seam 8 has better anti-peeling performance under the combined action of plastic bonding and steel wire bundling.

Claims

1. A rodent-proof optical cable, characterized in that: It comprises a cable core, a corrugated plastic-coated steel belt (6), a polymer jacket (7), and a steel belt lap joint (8); wherein: The cable core comprises a reinforcing core (1), an optical fiber (2), a sleeve (3) and a binding yarn (4); The sleeve (3) is arranged around the reinforcing core (1); The binding yarn (4) is provided with an embossed plastic-coated steel belt (6) outside; The outer layer of the corrugated plastic-coated steel strip (6) is wrapped with a tying steel wire (5); The outer layer of the steel belt lap joint (8) of the embossed plastic-coated steel belt (6) is provided with bonding holes (9); The polymer jacket (7) is wrapped in the outer layer of the corrugated plastic-coated steel strip (6); The corrugated plastic-coated steel strip (6) is coated on one or both sides with a film that can be thermally bonded to the polymer jacket (7), so that the corrugated plastic-coated steel strip (6) and the polymer jacket (7) form a whole with strong bonding force, thereby enhancing the resistance of the optical cable jacket to external forces; The formed steel tape wraps the cable core and enters the polymer jacket (7) melt extrusion die. The polymer jacket (7) melt is injected into the hole under the action of the high extrusion pressure. The polymer jacket (7) melt is bonded to the inner layer of the steel tape coating film. After cooling and finalization, the inner and outer layers of the polymer bonded steel tape lap joint (8) in the hole of the outer layer bonding hole (9) are overlapped to form a rivet structure, thereby enhancing the structural strength of the steel tape lap joint (8). In addition, the polymer in the hole is not easily gnawed by rodents. When the optical cable is damaged by rodents, the rivet structure formed at the steel tape lap joint (8) can resist further damage by rodents. After the corrugated plastic-coated steel strip (6) is longitudinally wrapped and formed, it is then spirally wrapped around the winding steel wire (5). The winding steel wire (5) and the corrugated plastic-coated steel strip (6) then enter a molten extrusion die to be coated with a plastic outer sheath. The molten plastic has a certain pressure and can completely coat the winding steel wire (5) and the corrugated plastic-coated steel strip (6) without any gaps, thereby ensuring that the sheath structure meets the product standard requirements.

2. A rodent-proof optical cable according to claim 1, characterized in that: The cable core also includes a filler, which is also arranged around the reinforcing core (1).

3. A rodent-proof optical cable according to claim 2, characterized in that: The bonding hole (9) is circular or elliptical, and the diameter of the bonding hole (9) is 0.8 to 1.2 mm.

4. A rodent-proof optical cable according to claim 3, characterized in that: The embossed plastic-coated steel strip (6) is coated on one side or both sides with a film that can be thermally bonded to the polymer jacket (7).

5. A rodent-proof optical cable according to claim 4, characterized in that: The binding steel wire (5) is a single-strand steel wire or a double-strand steel wire.

6. A rodent-proof optical cable according to claim 5, characterized in that: The pitch of the single-strand steel wire is 20-60 mm; the pitch of the double-strand steel wire is 40-120 mm; and the spacing between adjacent steel wires during the double-strand steel wire winding is 20-60 mm.

7. A rodent-proof optical cable according to claim 6, characterized in that: The outer diameter of the binding steel wire (5) is 0.12-0.25 mm.

8. A rodent-proof optical cable according to claim 7, characterized in that: The binding steel wire (5) is a stainless steel wire, a steel wire with a phosphating surface, a steel wire with a surface coated with an anti-corrosion resin, or a zinc-plated, nickel-plated, and copper-plated steel wire.

9. A rodent-proof optical cable according to claim 8, characterized in that: The corrugated plastic-coated steel strip (6) is rolled into a corrugated pattern, and the corrugation depth of the corrugated plastic-coated steel strip (6) is 0.4-0.6 mm.

10. A method for manufacturing a rodent-proof optical cable, for use with a rodent-proof optical cable as claimed in any one of claims 1 to 9, characterized in that: Including optical fiber coloring, secondary casing, SZ stranding cable, longitudinally wrapped plastic-coated steel belt with hole type, winding steel wire, melt extrusion coating and finished optical cable; The steps are as follows: S1 Fiber coloring, coloring the optical fiber; S2 secondary sleeve, used to coat the colored optical fiber; S3 SZ stranding and cabling, using a stranding and cabling machine to cable the optical fiber after the casing treatment; S4 Longitudinally wrapped with plastic-coated steel tape with holes, the cable core after cabling is longitudinally wrapped with plastic-coated steel tape with holes; S5: After wrapping the plastic-coated steel belt with holes longitudinally, use the binding wire to wrap it; S6 melt extrusion coating, after winding is completed, use an extrusion die for extrusion coating; S7 finished fiber optic cable.

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