A single-jacketed rodent-proof central tube type optical cable

Abstract

The utility model discloses a single sheath ratproof central tube type optical cable, including optical fiber unit, thimble, fibre paste, reinforcing element, armoring layer, sheath and cable core filling body, and a plurality of number optical fiber units set in the center of thimble, the fibre paste is filled in thimble, and a plurality of reinforcing element annular setting is in the periphery of thimble, the armoring layer and sheath are set in the periphery of a plurality of reinforcing element from inside to outside respectively, and the cable core filling body is filled between thimble and armoring layer. This public discloses on the basis of traditional central tube type optical cable from inside to outside in turn sets up steel wire reinforcing element, armoring and sheath structure, and the performance of product ratproof bite and the performance of resisting external force tensile or impact are greatly enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of optical transmission systems, and in particular to a single-sheathed rodent-proof central tube optical cable. Background Technology

[0002] Central tube optical cables, employing a central loose tube structure, are suitable for low-core-count optical cables. They can be laid in various ways, including overhead installations for outdoor applications, underground installations, and even underwater installations. However, both overhead and underground installations are susceptible to damage from rodents such as rats, which can severely damage the cable structure and disrupt communication lines. Currently, rodent-resistant central tube optical cables are rare on the market, or if they exist, their performance is often poor. Therefore, there is an urgent need to develop a rodent-resistant central tube optical cable, which led to this project. Utility Model Content

[0003] The purpose of this disclosure is to provide a single-sheathed rodent-proof central tube optical cable, which achieves the purpose of preventing rodent gnawing by setting an annular reinforcing element around the optical fiber unit, thereby extending the service life of the product and improving the reliability of data transmission.

[0004] This disclosure provides a single-sheathed rodent-proof central tube optical cable, comprising optical fiber units, loose tubes, fiber grease, reinforcing elements, armor layers, sheaths, and core fillers. A plurality of optical fiber units are disposed at the center of the loose tubes, the fiber grease is filled inside the loose tubes, a plurality of reinforcing elements are arranged in a ring around the periphery of the loose tubes, the armor layers and the sheaths are respectively disposed around the periphery of the plurality of reinforcing elements from the inside out, and the core fillers are filled between the loose tubes and the armor layers.

[0005] This disclosure provides an annular reinforcing element between the optical fiber unit and the armor layer. On the one hand, the armor layer provides the first layer of rodent protection, and on the other hand, the annular reinforcing element provides the second layer of rodent protection. Therefore, the rodent protection performance of the central tube optical cable is greatly improved through this double-layer protection.

[0006] According to at least one embodiment of this disclosure, the reinforcing element is a steel wire with a diameter of 0.8-1.5 mm. Preferably, a 1.0 mm steel wire is used as the reinforcing element. Using steel wire as the reinforcing element, tightly wrapped around the loose tube, not only prevents rodents from gnawing and protects the optical cable, but also improves the tensile and compressive strength of the optical cable, allowing for aerial or direct burial installation. Furthermore, using steel wire as the reinforcing element results in a heavier weight than FRP (fiber reinforced plastic), allowing for underwater installation and stronger resistance to water pressure.

[0007] According to at least one embodiment of this disclosure, the number of optical fiber units is 8-16 cores. Preferably, 12-core optical fiber units are used. Using a low-core-count optical cable is more suitable for center-tube optical cable structures.

[0008] According to at least one embodiment of this disclosure, a water-blocking layer is further included, wherein the water-blocking layer is disposed between the armor layer and the sheath, and the water-blocking layer is one or more layers of a polyester nonwoven fabric composite polymer absorbent resin layer. This disclosure allows for the provision of one or more water-blocking layers, depending on the specific conditions of the laying environment, to provide waterproof protection of different strength levels.

[0009] According to at least one embodiment of this disclosure, the optical cable further includes an aluminum foil longitudinal wrapping tape, which is disposed between the water-blocking layer and the armor layer, and has the functions of moisture-proofing, shielding and armoring.

[0010] According to at least one embodiment of this disclosure, the optical cable further includes filler tubes, a plurality of which are disposed within the loose tube. The use of filler tubes serves two purposes: firstly, to provide support and filling; and secondly, to prevent the optical fiber units from compressing each other during stretching or retraction, thus better protecting the optical fiber units.

[0011] According to at least one embodiment of this disclosure, the optical cable further includes a cable-opening cord disposed between the water-blocking layer and the armor layer. The cable-opening cord provided in this disclosure allows operators to strip the optical cable more quickly and easily.

[0012] According to at least one embodiment of this disclosure, the sheath contains micro-air chambers, which can effectively reduce the weight of the sheath and the overall weight of the optical cable. Attached Figure Description

[0013] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0014] Figure 1 This is a schematic diagram of the structure of the single-sheathed rodent-proof central tube optical cable disclosed in this publication. Detailed Implementation

[0015] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0016] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, this disclosure presents a single-sheathed rodent-proof central tube optical cable, comprising optical fiber units 1, loose tubes 2, fiber optic grease 3, reinforcing elements 4, armor layer 5, sheath 6, and core filler 7; 8-16 core optical fiber units 1 are disposed in the center of the loose tube 2, preferably 12 core optical fiber units; fiber optic grease 3 fills the loose tube 2, and the grease 3 is a commercially available optical fiber grease, such as LT-420 type optical fiber filler grease, and is filled in the loose tube 2, which can be a loose tube with a diameter of 3.0 mm; 10-14 reinforcing elements 4 are arranged in a ring around the periphery of the loose tube 2, and the reinforcing elements are preferably made of steel wire with a diameter of 0.8-1.5 mm, preferably 1.0 mm. The steel wire 4 is used as a reinforcing element, tightly wrapped around the loose tube. This not only prevents rodents from gnawing on the optical cable and protects it, but also improves the tensile and compressive strength of the optical cable. It can be laid overhead or directly buried. Moreover, using steel wire as a reinforcing element makes it heavier than FRP (fiber reinforced plastic), allowing it to be laid underwater and providing stronger resistance to water pressure. The armor layer 5 and the sheath 6 are respectively arranged around the periphery of several reinforcing elements 4 from the inside out. The armor layer 5 is a plastic-coated steel tape or a plastic-coated aluminum tape. The sheath 6 can be a polyethylene sheath with an outer diameter of 9.6 mm and has UV protection. The cable core filler 7 is filled between the loose tube 2 and the armor layer 5. The cable core filler 7 is a commonly available filler grease, such as ZLT-60 type filler grease.

[0018] This disclosure also includes a water-blocking layer (not shown in the figures), which is disposed between the armor layer 5 and the sheath 6. The water-blocking layer of this disclosure is one or more layers of polyester non-woven fabric composite polymer absorbent resin layer. This disclosure can provide one or more water-blocking layers to provide different levels of waterproof protection depending on the specific conditions of the laying environment.

[0019] This disclosure also includes a filling hose 8, which is wound in layers inside the loose tube 2. The filling hose 8 provides support and filling for the optical fiber units inside the loose tube 2, and also prevents the optical fiber units from squeezing each other when stretched or retracted, thus better protecting the optical fiber units.

[0020] This disclosure also includes a cable-opening rope (not shown) disposed between the water-blocking layer and the armor layer 5. The cable-opening rope provided in this disclosure allows operators to strip the optical cable of this disclosure more quickly and easily.

[0021] This disclosure also includes longitudinal aluminum foil wrapping tape (not shown), which is disposed between the water-blocking layer and the armor layer and has the functions of moisture protection, shielding and armoring.

[0022] The sheath 6 of this invention has micro-air chambers distributed inside. The use of distributed micro-air chambers in this invention helps to reduce the overall weight of the optical cable, making it easier to reduce its own weight when laid at high altitudes.

[0023] This disclosure also includes rodenticides, which are placed in micro-gas chambers and / or mixed in the cable core filler. The rodenticides are cucurbitacin or capsaicin, which can provide chemical rodent control.

[0024] This invention, based on the traditional central tube optical cable, sequentially incorporates steel wire reinforcing elements, armor, and a sheath structure from the inside out, significantly enhancing the product's resistance to rodent bites and its resistance to external tensile or impact forces. This unique structural design ensures the stability of data transmission. The tensile and compressive strength of this product makes it suitable for outdoor aerial or direct burial installations, and the use of heavy steel wire as reinforcing elements also makes it suitable for underwater installations.

[0025] The performance parameters of this product are as follows:

[0026] Tensile (long-term) ≤2000N;

[0027] Tensile strength (short-term) ≤5000N;

[0028] Flattening (long-term) ≤1000N / 10cm;

[0029] Flattening (short-term) ≤3000N / 10cm;

[0030] Minimum bending radius (dynamic) ≤ 20Dmm;

[0031] Minimum bending radius (static) ≤ 10Dmm;

[0032] Installation temperature: -20℃ to +60℃;

[0033] Operating temperature: -40℃ to +70℃;

[0034] Storage temperature: -40℃ to +70℃.

[0035] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0036] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A single-sheathed rodent-proof central tube optical cable, characterized in that, The cable includes optical fiber units, loose tubes, fiber optic paste, reinforcing elements, armor layers, sheaths, and core fillers. A number of optical fiber units are disposed at the center of the loose tubes. The fiber optic paste fills the loose tubes. A number of reinforcing elements are arranged in a ring around the periphery of the loose tubes. The armor layers and sheaths are respectively disposed around the periphery of the reinforcing elements from the inside out. The core fillers are filled between the loose tubes and the armor layers. The optical cable also includes filling tubes, a number of which are disposed within the loose tubes. Micro-air chambers are distributed within the sheath. The cable also includes a rodenticide, which is disposed within the micro-air chambers and / or mixed with the core fillers. The rodenticide is either cucurbitacin or capsaicin.

2. The optical cable as described in claim 1, characterized in that, The reinforcing element is a steel wire with a diameter of 0.8-1.5 mm.

3. The optical cable as described in claim 1, characterized in that, The number of optical fiber units is 8-16 cores.

4. The optical cable as described in claim 1, characterized in that, It also includes a water-blocking layer, which is disposed between the armor layer and the sheath, and the water-blocking layer is one or more layers of polyester nonwoven fabric composite polymer absorbent resin layer.

5. The optical cable as described in claim 4, characterized in that, The optical cable also includes a longitudinal aluminum foil wrapping tape, which is disposed between the water-blocking layer and the armor layer.

6. The optical cable as described in claim 4, characterized in that, The optical cable also includes a cable opening cord, which is disposed between the water-blocking layer and the armor layer.

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