A double-jacketed double-mouse-proof central tube type optical cable

Abstract

This utility model discloses a double-sheathed, double-rodent-proof central tube optical cable, comprising optical fiber units, loose tubes, fiber optic paste, FRP reinforcing elements, water-blocking tape, inner sheath, water-blocking glass yarn, and outer sheath. A number of optical fiber units are disposed at the center of the loose tube, and the fiber optic paste fills the loose tube. A number of reinforcing elements are arranged in a ring around the periphery of the loose tube. The water-blocking tape, inner sheath, water-blocking glass yarn, and outer sheath are respectively arranged around the periphery of the reinforcing elements from the inside out. This disclosure, based on the traditional central tube optical cable, sequentially incorporates a first rodent-proof unit structure composed of FRP reinforcing elements, water-blocking tape, and inner sheath, and a second rodent-proof unit structure composed of water-blocking glass yarn and outer sheath from the inside out, significantly enhancing the product's rodent-proof and waterproof performance.

Description

Technical Field

[0001] This utility model relates to the technical field of optical transmission systems, and in particular to a double-sheathed, double-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, during overhead or underground installations, rodents such as rats frequently gnaw at the cable, severely damaging its structure and causing communication line disruptions. Currently, rodent-resistant central tube optical cables are rare on the market, or if they exist, they are generally single-sheathed with limited rodent protection. Therefore, there is an urgent need to develop a double-sheathed central tube optical cable that can prevent rodent damage, leading to this project. Summary of the Invention

[0003] The purpose of this disclosure is to provide a double-sheathed, double-rodent-proof central tube optical cable. By setting a double-layer rodent-proof unit around the optical fiber unit, the cable can prevent rodents from gnawing on it, thereby extending the product's service life and improving the reliability of data transmission.

[0004] This disclosure provides a double-sheathed, double-rodent-proof, central tube optical cable, comprising optical fiber units, loose tubes, fiber optic paste, FRP reinforcing elements, water-blocking tape, inner sheath, water-blocking glass yarn, and outer sheath. A number of optical fiber units are disposed at the center of the loose tube, the fiber optic paste is filled inside the loose tube, and a number of reinforcing elements are arranged in a ring around the periphery of the loose tube. The water-blocking tape, the inner sheath, the water-blocking glass yarn, and the outer sheath are respectively disposed around the periphery of the reinforcing elements from the inside out.

[0005] This disclosure employs a two-layer rodent-proof unit structure. The first layer consists of an outer sheath and water-resistant glass fiber mesh; the second layer consists of an inner sheath, a water-resistant strip, and reinforcing elements. The inner and outer sheaths are relatively hard and resistant to rodent gnawing. The water-resistant glass fiber mesh and FRP (fiber-reinforced plastic) reinforcing elements contain glass fiber, which irritates the rodent's cavities after gnawing, thus preventing further rodent damage. The water-resistant strip provides both waterproofing and physical rodent protection. Therefore, this disclosure offers superior rodent-proof performance through its double-layer rodent-proof unit.

[0006] According to at least one embodiment of this disclosure, the diameter of the FRP reinforcing element is 0.8-1.2 mm.

[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, the water-blocking tape is one or more layers of a polyester nonwoven fabric composite polymer absorbent resin layer.

[0009] 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.

[0010] According to at least one embodiment of this disclosure, the optical cable further includes a water-locking layer disposed between the loose tube and the FRP reinforcing element. When the sheath is damaged and moisture seeps into the periphery of the loose tube, the water-locking layer rapidly absorbs the moisture and expands to prevent moisture from penetrating inward. The water-locking layer is made of polyester at its core and a polymer gel absorbent material on its periphery.

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

[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 double-sheathed, double-rodent-proof central tube optical cable disclosed herein. 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 1As shown, this disclosure discloses a double-sheathed, double-rodent-proof, central tube optical cable, comprising optical fiber units 1, loose tubes 2, fiber optic grease 3, FRP reinforcing elements 4, water-blocking tape 5, inner sheath 6, water-blocking glass yarn 7, and outer sheath 8; 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 fiber optic grease 3 is a commercially available optical fiber grease, such as LT-420 type optical fiber filling grease, which is filled into the loose tube 2. The loose tube can be 2.3 mm in diameter. Loose sleeve; 10-14 FRP reinforcing elements 4 are arranged in a ring around the loose sleeve 2. The diameter of the FRP reinforcing elements is 0.8-1.2mm. Preferably, FRP with a diameter of 1.0mm is used as the reinforcing element; Water-blocking tape 5, inner sheath 6, water-blocking glass yarn 7 and outer sheath 8 are respectively arranged around the FRP reinforcing elements 4 from the inside to the outside; Water-blocking tape 5 is 1-3 layers of polyester non-woven fabric composite polymer absorbent resin layer; The inner sheath 6 or the outer sheath 8 can be made of polyethylene sheath, with an outer diameter of 6.2mm for the inner sheath and 9.8mm for the outer sheath.

[0018] This disclosure also includes a filling hose 9, which is wound in layers inside the loose tube 2. The filling hose 9 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.

[0019] This disclosure also includes a water-locking layer 10, which is disposed between the loose sleeve 2 and the FRP reinforcing element 4. When the sheath is damaged and moisture seeps into the periphery of the loose sleeve, the water-locking layer 10 quickly absorbs the moisture and expands to prevent moisture from penetrating inward. The water-locking layer is made of polyester at the center and a polymer gel water-absorbing material on the periphery.

[0020] This disclosure also includes a cable release cord (not shown), which is disposed in the water-blocking glass yarn 7. The cable release cord provided in this disclosure allows operators to strip the optical cable of this disclosure more quickly and easily.

[0021] The inner sheath 6 or outer sheath 8 of this disclosure has micro-air chambers distributed inside. The use of distributed micro-air chambers in this disclosure helps to reduce the overall weight of the optical cable, making it easier to reduce its own weight when laid at high altitudes.

[0022] This disclosure also includes a rodent repellent agent, which is placed in a micro-chamber and / or coated on a water-resistant glass yarn. If coated on the water-resistant glass yarn, a rodent repellent layer is formed on the surface of the water-resistant glass yarn. The rodent repellent agent is cucurbitacin or capsaicin, which can play a chemical rodent-repellent role.

[0023] This invention, based on the traditional central tube optical cable, sequentially incorporates a first rodent-proof unit structure consisting of an FRP reinforcing element, a water-blocking tape, and an inner sheath, and a second rodent-proof unit structure consisting of water-blocking glass fiber mesh and an outer sheath, significantly enhancing the product's rodent-proof and waterproof performance. This unique structural design ensures the stability of data transmission. This product contains no metal materials, is lightweight, and is particularly suitable for overhead or direct burial installations in areas with high rainfall and frequent thunderstorms.

[0024] The performance parameters of this product are as follows: Tensile (long-term) ≤1000N; Tensile (short-term) ≤3000N; Flattening (long-term) ≤800N / 10cm; Flattening (short-term) ≤2000N / 10cm; Minimum bending radius (dynamic) ≤ 20Dmm; Minimum bending radius (static) ≤ 10Dmm; Installation temperature: -20℃ to +60℃; Operating temperature: -40℃ to +70℃; Storage temperature: -40℃ to +70℃.

[0025] 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.

[0026] 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 double-jacketed double-mouse-guarded central tube cable, characterized by, The device includes optical fiber units, loose tubes, fiber optic paste, FRP reinforcing elements, water-blocking tape, inner sheath, water-blocking glass yarn, and outer sheath. A number of optical fiber units are disposed at the center of the loose tube, the fiber optic paste is filled inside the loose tube, and a number of reinforcing elements are arranged in a ring around the periphery of the loose tube. The water-blocking tape, the inner sheath, the water-blocking glass yarn, and the outer sheath are respectively disposed around the periphery of the reinforcing elements from the inside to the outside.

2. The optical cable of claim 1 wherein, The diameter of the FRP reinforcing element is 0.8-1.2 mm.

3. The optical cable of claim 1 wherein, The number of optical fiber units is 8-16 cores.

4. The optical cable of claim 1 wherein, The water-blocking tape is one or more layers of polyester nonwoven fabric composite polymer absorbent resin layer.

5. The optical cable of claim 1 wherein, The optical cable also includes a water-locking layer, which is disposed between the loose tube and the FRP reinforcing element.

6. The optical cable of claim 1 wherein, The optical cable also includes a filler tube, and a number of the filler tubes are disposed inside the loose tube.

7. The optical cable of claim 1 wherein, The optical cable also includes a cable opening cord, which is disposed within the water-blocking glass yarn.

8. The optical cable of claim 1 wherein, Micro-air chambers are distributed within the inner sheath or the outer sheath.

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