CN114706178A - A lightweight and safe all-dielectric self-supporting overhead drop cable - Google Patents

Abstract

The invention discloses a light-weight and safe all-media self-supporting overhead drop-in optical cable, which relates to the technical field of optical cables. Introduce the safety of the optical cable into the home to ensure the safe operation of the optical cable line. The main technical scheme adopted is: a tight-sleeve optical fiber, the outer surface of which is coated with a layer of curable material; a buffer layer, which is wrapped on the tight-sleeve optical fiber; a loose tube, which is wrapped on the buffer layer; two non-metallic reinforcements, which are respectively arranged on both sides of the loose tube; an outer sheath, which is wrapped around the two non-metallic reinforcements and the loose tube; color strips, which are extruded on the on the outer jacket.

Description

A lightweight and safe all-dielectric self-supporting overhead drop cable

technical field

The invention relates to the technical field of optical cables, in particular to a light-weight and safe all-media self-supporting overhead drop-in optical cable.

Background technique

Due to the differences in application field personnel such as building groups, data installation methods, laying environment, and application areas, it will inevitably bring about great differences in the structure and performance requirements of light optical cables used in communication access networks. YD/T3349-2018 "Light Optical Cables for Access Network" standard specifies the central tube type, bundle type and layer twist type structure, which is suitable for outdoor non-self-supporting overhead, pipeline, channel, wall hanging, nailing and building Light-weight optical cable for access network with laying methods such as lead and lead. At present, butterfly optical cable is the most commonly used type of overhead drop cable, mainly using FTTH optical fiber to access user terminals. Considering the fast and convenient installation, users prefer to use self-supporting butterfly optical cables. However, in the current engineering application, the eye-supporting butterfly optical cable has great potential safety hazards in some applications: for example, the wire suspension wire of the white-supporting butterfly optical cable is easily introduced by lightning, causing electric shock accidents for personnel, and bringing safety hazards to families and substations: The self-supporting butterfly optical cable is used in rural households, and the height of the inner line pole is low. The optical cable line accidentally encounters the vehicle overhead, and the optical cable is broken but the line pole is pulled down, causing the entire optical cable line to be interrupted. Based on this, a lighter and safer all-dielectric self-supporting overhead drop cable was developed.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a light-weight and safe all-media self-supporting overhead drop optical cable, the main purpose of which is to solve the problem of potential safety hazards after the laying and installation of the self-supporting butterfly optical cable, and improve the safety of the introduction of the optical cable into the home. , to ensure the safe operation of optical cable lines.

To achieve the above object, the present invention mainly provides the following technical solutions:

Embodiments of the present invention provide a lightweight and safe all-dielectric self-supporting overhead drop optical fiber cable. It includes:

Tight-buffered optical fibers, the outer surface of which is coated with a layer of curable material;

a buffer layer wrapped around the tight-buffered optical fiber;

a loose tube wrapped around the buffer layer;

two non-metallic reinforcements, which are respectively arranged on both sides of the loose tube;

an outer sheath wrapped around the two non-metallic reinforcements and the loose tube;

Color strips, which are extruded onto the outer jacket.

As mentioned above, the tight-buffered optical fiber adopts a large-clad optical fiber, and the diameter of the optical fiber is 124.9±0.2 μm.

As mentioned above, the curable material is a silicone resin material.

As mentioned above, the buffer layer is made of acrylate resin material.

As mentioned above, the loose tube is a PBT loose tube.

As mentioned above, the non-metallic reinforcement is a composite non-metallic rod.

As mentioned above, the outer sheath is a high-density, low-shrinkage, low-elongation polyethylene sheath.

As mentioned above, the color bars are reflective color bars.

As previously mentioned, it also includes:

A tear cord is provided between the loose tube and the outer sheath.

With the above technical solutions, the light-weight and safe all-dielectric self-supporting overhead drop optical cable of the present invention has at least the following advantages:

The light-weight and safe all-dielectric self-supporting overhead drop-in cable of the present invention adopts an all-dry non-metallic structure and has no risk of conducting electricity. After the buffer layer is extruded, the PBT sleeve is designed to closely combine the tight sleeve and the sleeve, and the application of special reinforcing materials and sheath materials has excellent environmental and mechanical properties. The safety of the entire line pole after the overhead optical cable is impacted by external force is ensured; and the invention has simple structure, light weight, good mechanical performance and transmission performance, reasonable design, compact structure, and convenient use and maintenance.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the description, the following detailed description is given with the preferred embodiments of the present invention and the accompanying drawings.

Description of drawings

FIG. 1 is a schematic structural diagram of the light-weight and safe all-dielectric self-supporting overhead drop optical cable according to the present invention.

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following in conjunction with the accompanying drawings and preferred embodiments, the specific embodiments, structures, features and effects of the application according to the present invention are described in detail as follows .

As shown in FIG. 1, an embodiment of the present invention proposes a light-weight and safe all-dielectric self-supporting overhead drop optical cable, which includes: a tight-buffered optical fiber 1, a buffer layer 2, a loose tube 3, and two non-metallic Reinforcing piece 4, outer sheath 5 and color strip 6.

As shown in FIG. 1 , the outer surface of the tight-buffered optical fiber 1 is coated with a layer of curable material, and the curable material adopts a silicone resin material. In the present invention, the tight-buffered optical fiber 1 adopts a large-clad optical fiber, The diameter of the fiber is 124.9±0.2μm, the concentricity error between the fiber and the ferrule is smaller, the fiber core is more centered, the insertion loss of the connector assembly is smaller, and the index data is more stable. The buffer layer 2 is wrapped on the tight-buffered optical fiber 1. In the present invention, the buffer layer 2 is made of acrylic resin material. The loose tube 3 is wrapped on the buffer layer 2. In the present invention, the loose tube 3 adopts a PBT loose tube, and in the present invention, the tight-coated optical fiber 1 is placed in the PBT tube to replace the bare optical fiber. , it is more convenient when the optical cable is prefabricated and has better protection performance for the optical fiber, and by coating a layer of curable material on the outside of the tight-buffered optical fiber, and wrapping the buffer layer 2 on the outside of the tight-buffered optical fiber, then extruding the PBT sleeve , so that the optical cable of the present invention forms a fully dry structure without the risk of conduction, and at the same time ensures that the loose tube can be quickly peeled off by 15-25 cm. The two non-metallic reinforcements 4 are respectively arranged on both sides of the loose tube 3. In the present invention, the non-metallic reinforcements use composite non-metallic rods, which have higher modulus and smaller breaking force. The outer sheath 5 is wrapped on the two non-metallic reinforcements and the loose tube. In the present invention, the outer sheath 5 is a high-density, low-shrinkage, and low-elongation polyethylene The overall environmental performance index requirements of the optical cable, while ensuring that the overall breaking force of the optical cable meets the index requirements. The color bar 6 is extruded on the outer sheath 5. In the present invention, the color bar 6 is a reflective color bar, which is convenient for identifying the optical cable. In the present invention, the light-weight and safe all-dielectric self-supporting overhead drop cable further comprises: a tearing rope 7, which is arranged between the loose tube 3 and the outer sheath 5 to facilitate the stripping of the optical cable . In the present invention, the overall size of the light-weight and safe all-dielectric self-supporting overhead drop optical cable is 5.0±0.2 mm, and the overall brittle breaking force ensures that each component of 1300N-2000N is brittle at the same time.

The light-weight and safe all-dielectric self-supporting overhead drop optical cable according to the embodiment of the present invention adopts an all-dry non-metallic structure and has no risk of conducting electricity. After wrapping the buffer layer and then extruding the PBT sleeve, the tight sleeve and the sleeve are designed to be closely combined, and the application of special reinforcing materials and sheath materials has excellent environmental and mechanical properties, and the overall optical cable is brittle within the specified force value range. It ensures the safety of the entire line pole after the overhead optical cable is impacted by external force; and the invention has simple structure, light weight, good mechanical performance and transmission performance, reasonable design, compact structure, and convenient use and maintenance.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (9)

1. a light-weight and safe all-media self-supporting overhead drop-in optical cable, is characterized in that: it comprises: Tight-buffered optical fibers, the outer surface of which is coated with a layer of curable material; a buffer layer wrapped around the tight-buffered optical fiber; a loose tube wrapped around the buffer layer; two non-metallic reinforcements, which are respectively arranged on both sides of the loose tube; an outer sheath wrapped around the two non-metallic reinforcements and the loose tube; Color strips, which are extruded onto the outer jacket. 2. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, characterized in that, The tight-buffered optical fiber adopts a large cladding optical fiber, and the diameter of the optical fiber is 124.9±0.2 μm. 3. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, characterized in that, The curable material is a silicone resin material. 4. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, characterized in that, The buffer layer is made of acrylate resin material. 5. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, characterized in that, The loose tube is a PBT loose tube. 6. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, characterized in that, The non-metallic reinforcement adopts a composite non-metallic rod. 7. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, characterized in that, The outer sheath is a high-density, low-shrinkage, and low-elongation polyethylene sheath. 8. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, characterized in that, The color bars are reflective color bars. 9. The light-weight and safe all-dielectric self-supporting overhead drop optical fiber cable according to claim 1, further comprising: A tear cord is provided between the loose tube and the outer sheath.

Images