A low-wind-resistance, all-dielectric, easy-to-install self-supporting microcable

Abstract

This utility model discloses a low-wind-resistance, all-dielectric, easy-to-construct, self-supporting microcable, comprising an upper lifting section, a lower optical cable section, and a sheath covering the lifting section and the optical cable section. The sheath has a figure-eight shaped cross-section. An FRP rod is installed inside the lifting section, arranged parallel to the optical cable axis. A loose tube is installed inside the optical cable section, covered with fiberglass tape, and contains an optical fiber. A V-shaped tear groove is provided at the connection area between the lifting section and the optical cable section of the sheath. This utility model, through optimized design of all-dielectric materials and structure, reduces the weight and outer diameter of the optical cable, improves wind resistance and anti-icing capabilities, and simplifies the construction process, reducing construction difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of communication optical cable technology, specifically to a low-wind-resistance, all-dielectric, easy-to-construct, self-supporting microcable. Background Technology

[0002] Optical fiber cables have become a crucial infrastructure supporting economic development. All-dielectric self-supporting optical cables are a type of optical communication cable specifically designed for power transmission lines. They are manufactured using all-dielectric materials, containing no metal components, thus possessing excellent electrical insulation properties and resistance to electromagnetic interference. For example, ADSS optical cables have sufficient mechanical strength to be directly suspended between power poles without additional support structures; however, ADSS cables use aramid fiber as a tensile reinforcement material, resulting in a higher overall cost. All-dielectric self-supporting figure-eight cables are also commonly used in some power line applications.

[0003] With the rapid development of communication networks, continuously reducing the overall cost of optical cable products while ensuring their lifespan and stability in applications is a persistent goal for product companies and optical cable R&D personnel, and also a market demand. While existing self-supporting optical cables can meet basic requirements, they still have the following shortcomings in practical applications:

[0004] 1. Large weight: The existing optical cable's overall structural design requires the use of more sheath material, which increases its weight. This not only increases product cost, but also requires the use of larger cross-sectional area reinforcing elements to meet tensile performance requirements for the same span.

[0005] 2. Significant wind resistance and icing issues: Traditional optical cables have a large cross-sectional area, resulting in high wind resistance when laid overhead; during winter icing, a larger cross-sectional area increases the risk of icing and the weight of icing, affecting the stability of the optical cable.

[0006] 3. Insufficient construction convenience: The optical cable structure design is not conducive to rapid construction, especially when branching or stripping is required. The operation process is complicated, which increases construction time and cost and makes it difficult to meet the needs of efficient construction.

[0007] Therefore, developing a self-supporting microcable with low wind resistance, all-dielectric properties, and easy construction characteristics is of great practical significance in addressing the pain points of existing technologies, such as heavy weight, insufficient wind resistance and anti-icing capabilities, and complex construction, in order to meet the development needs of communication networks for high efficiency, stability, and low cost. Utility Model Content

[0008] In view of this, the purpose of this utility model is to provide a low-wind-resistance, all-medium, easy-to-construct, self-supporting microcable.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A low-wind-resistance, all-dielectric, easy-to-install self-supporting microcable includes an upper hoisting section, a lower optical cable section, and a sheath covering the hoisting section and the optical cable section. The sheath has a figure-eight shaped cross-section. An FRP rod is installed inside the hoisting section, and the FRP rod is arranged parallel to the optical cable axis. A loose tube is installed inside the optical cable section, and the loose tube is covered with fiberglass tape. An optical fiber is installed inside the loose tube.

[0011] The connection area between the hoisting part and the optical cable part of the sheath is provided with a V-shaped tear groove.

[0012] Furthermore, a colored stripe is provided on the sheath located on the hoisting part, and the color of the colored stripe is different from the color of the sheath.

[0013] Furthermore, the sheath is made of glass fiber reinforced PE material.

[0014] Furthermore, the loose sleeve is made of PBT material.

[0015] Furthermore, the loose sleeve is filled with grease.

[0016] Furthermore, the fiberglass tape outside the loose sleeve is at least one layer, and is wrapped in a spiral winding manner.

[0017] Furthermore, the number of optical fiber cores in the loose tube is 24 or less or 48.

[0018] Furthermore, the width of the V-shaped tear groove is 0.5-1mm, and the groove angle is 60°-120°.

[0019] Compared with existing technologies, the advantages of this invention are as follows: Through the use of all-dielectric materials and a figure-eight cross-section design, the weight and outer diameter of the optical cable are significantly reduced compared to traditional products, improving wind resistance and anti-icing capabilities. The high core density design and glass fiber reinforced PE sheath further enhance the mechanical properties and environmental adaptability of the optical cable. The V-shaped tear groove on the outer sheath allows for easy removal of the sleeve after tearing, reducing construction difficulty. This application is applicable to self-supporting installations on power poles and has broad market application prospects. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Appendix Figure 1 This is a schematic diagram of the structure of an embodiment of this application.

[0022] Explanation of reference numerals and components in the accompanying drawings:

[0023] 1. Lifting section; 2. Optical cable section; 3. Sheath; 4. FRP pole; 5. Loose tube; 6. Fiberglass tape; 7. Optical fiber; 8. V-shaped tear groove; 9. Color stripe. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described through specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] See appendix Figure 1 As shown, this application presents a low-wind-resistance, all-dielectric, easy-to-install self-supporting microcable that solves the problems of heavy weight, high wind resistance, and complex construction in existing optical cables through all-dielectric materials, structural optimization, and easy branching design, achieving the technical effects of lightweight, low wind resistance, and easy construction. Firstly, in terms of mechanical performance, the optical cable must have sufficient tensile strength and lateral pressure resistance to withstand external stresses such as its own weight, wind load, and ice load. Secondly, in terms of electrical performance, all-dielectric materials are used to ensure excellent electrical insulation performance and electromagnetic interference resistance, ensuring safe operation near high-voltage transmission lines. Regarding environmental adaptability, capabilities such as wind resistance and icing resistance should be considered. In terms of installation convenience, construction convenience should be considered, along with the flexibility and minimum bending radius of the optical cable to adapt to different installation environments.

[0026] This application discloses a low-wind-resistance, all-dielectric, easy-to-install self-supporting microcable, comprising an upper lifting section 1, a lower optical cable section 2, and a sheath 3 covering the lifting section 1 and the optical cable section 2. The sheath 3 has a figure-eight cross-section. Preferably, the figure-eight cross-section sheath 3 is made of fiberglass reinforced PE material. The fiberglass reinforced PE sheath 3 is not only lightweight but also reduces the cross-sectional area during icing, thus reducing the weight and risk of icing. An FRP rod 4 is installed inside the lifting section 1, arranged parallel to the optical cable axis to ensure that the optical cable can withstand external stresses such as its own weight and wind load during overhead laying, while avoiding electromagnetic interference and cost issues caused by metal materials. A loose tube 5 is installed inside the optical cable section 2. Preferably, the loose tube 5 is made of PBT material. The loose tube 5 is covered with fiberglass tape 6, and an optical fiber 7 is installed inside the loose tube 5. A V-shaped tear groove 8 is provided in the connection area between the lifting section 1 and the optical cable section 2 of the sheath 3. Preferably, the V-shaped tear groove 8 has a groove width of 0.5-1mm and a groove angle of 60°-120°. During construction, the sheath can be torn along the groove to quickly expose the loose tube, eliminating the need for special tools, simplifying branching operations, and shortening construction time. Preferably, the FRP rod 4 inside the hoisting part 1 is made of high-strength fiber-reinforced plastic, replacing traditional metal reinforcements, achieving a lightweight design with all dielectrics. The loose tube 5 is wrapped with at least one layer of fiberglass tape 6 in a spiral winding manner to enhance mechanical protection. The loose tube 5 is filled with waterproof grease to protect the optical fiber 7 from moisture corrosion and ensure signal transmission stability. The number of optical fiber cores can be 24 cores or less or 48 cores. Preferably, a color strip 9 is provided on the sheath 3 located in the hoisting part 1. The color of the color strip 9 is different from the color of the sheath 3, used to identify the branch position or core count specification, facilitating construction positioning and avoiding operational errors.

[0027] This application's all-dielectric structure uses all-dielectric materials, eliminating the need for metal reinforcements or metal sheaths, fundamentally reducing the weight and outer diameter of the optical cable. The low-wind-resistance design, through optimization of the cable's outer diameter and cross-sectional shape, reduces wind resistance during overhead laying, improving cable stability. The easy-to-branch structure design incorporates stripping grooves on the outer sheath; during construction, the outer sheath can be easily removed by tearing along these grooves, greatly simplifying the construction process and reducing construction difficulty. The fiberglass-reinforced PE sheath incorporates fiberglass reinforcement material into the outer sheath, improving the cable's mechanical properties and environmental adaptability, enabling stable operation in various harsh environments and preventing problems such as low-temperature cracking.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low windage all-dielectric easy-to-deploy self-supporting microcable, characterized in that, It includes an upper hoisting section, a lower optical cable section, and a sheath covering the hoisting section and the optical cable section. The sheath has a figure-eight shaped cross-section. An FRP rod is installed inside the hoisting section, and the FRP rod is arranged parallel to the optical cable axis. A loose tube is installed inside the optical cable section. The loose tube is covered with fiberglass tape, and an optical fiber is installed inside the loose tube. The connection area between the hoisting part and the optical cable part of the sheath is provided with a V-shaped tear groove.

2. A low wind-loss all-dielectric easy-to-deploy self-supporting micro-cable according to claim 1, characterized in that, A colored stripe is provided on the sheath located on the hoisting part, and the color of the colored stripe is different from the color of the sheath.

3. A low wind-loss all-dielectric easy-to-deploy self-supporting micro-cable according to claim 1, characterized in that, The sheath is made of glass fiber reinforced PE material.

4. A low wind-loss all-dielectric easy-to-deploy self-supporting micro-cable according to claim 1, characterized in that, The loose sleeve is made of PBT material.

5. The low-wind-resistance, all-dielectric, easy-to-construct, self-supporting microcable according to claim 1, characterized in that, The loose sleeve is filled with grease.

6. A low wind-loss all-dielectric easy-to-deploy self-supporting micro-cable according to claim 1, characterized in that, The fiberglass tape outside the loose sleeve is at least one layer and is wrapped in a spiral winding manner.

7. A low wind-loss all-dielectric easy-to-deploy self-supporting micro-cable according to claim 1, characterized in that, The number of optical fiber cores in the loose tube is 24 or less or 48.

8. A low wind-loss all-dielectric easy-to-deploy self-supporting micro-cable according to claim 1, characterized in that, The V-shaped tear groove has a width of 0.5-1mm and an opening angle of 60°-120°.

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