Flame retardant stretch resistant indoor flexible optical cable

Abstract

The utility model discloses a kind of flame-retardant tensile indoor soft optical cable, belong to indoor communication technical field.The utility model includes hose, the outer surface of hose is covered with framework, through hole is set up on framework, foam block is set in through hole, foam block is annular equidistant distribution on framework, the outer surface of hose is covered with outer sheath, framework is located between outer sheath and hose, foam block respectively contact the inner surface of hose and outer sheath.The utility model is filled with flame-retardant polyurethane foam block by the carbon fiber framework and its inside setting, carbon fiber framework itself has excellent thermal stability and heat insulation, can significantly block and delay the inward transmission of heat, and equidistant distribution foam block expands carbonization after being heated, forms a high-efficiency heat-insulating oxygen barrier, not only absorbs heat, but also can isolate oxygen, double effect jointly prevents the temperature of metal hose from rising rapidly, to provide reliable protection for internal fiber unit.

Description

Technical Field

[0001] This utility model relates to the field of indoor communication technology, specifically to a flame-retardant and tensile-resistant indoor flexible optical cable. Background Technology

[0002] With the increasing demands on cabling in modern buildings and indoor communication networks, indoor flexible optical cables have been widely used due to their advantages such as good flexibility and ease of installation. These cables typically consist of optical fiber units, a metal flexible conduit protective layer, and an outer sheath. The metal flexible conduit primarily provides mechanical protection and tensile strength, while the outer sheath provides basic insulation and protection. In environments such as data centers, high-rise buildings, and public facilities, optical cables not only need good mechanical properties but also must meet stringent flame-retardant safety standards to prevent the spread of fire along the cable in the event of a fire. Currently, most flame-retardant optical cables on the market use flame-retardant materials for the outer sheath or improve fire resistance by adding flame-retardant fillers to the structure. These methods can delay flame propagation to some extent, but they still have limitations. When the optical cable is burned, the metal flexible conduit heats up rapidly and conducts heat, causing damage to the internal optical fiber units. Utility Model Content

[0003] The purpose of this invention is to provide a flame-retardant and tensile-resistant indoor flexible optical cable. By using a carbon fiber skeleton and foam blocks, the problem of easy damage to the flexible optical cable when burned is solved.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model is a flame-retardant and tensile-resistant indoor flexible optical cable, including a flexible tube, the outer surface of which is covered with a skeleton, and the skeleton has through holes, with foam blocks placed inside the through holes.

[0006] Furthermore, the foam blocks are distributed in a ring-shaped, equidistant pattern on the skeleton.

[0007] Furthermore, the hose is covered with an outer sheath, the skeleton is located between the outer sheath and the hose, and the foam blocks are in contact with the outer surfaces of the hose and the outer sheath respectively.

[0008] Furthermore, the outer sheath has a pre-reserved groove in a ring shape, and each pre-reserved groove is provided with a damping pad, and each damping pad is in contact with the outer surface of the skeleton.

[0009] Furthermore, grooves are formed on the damping pad.

[0010] Furthermore, an optical fiber unit is installed inside the flexible tube, and water-blocking yarn is filled between the optical fiber unit and the flexible tube.

[0011] This utility model has the following beneficial effects:

[0012] This invention features a carbon fiber skeleton and flame-retardant polyurethane foam blocks inside. The carbon fiber skeleton itself has excellent thermal stability and heat insulation properties, which can significantly block and delay the inward transfer of heat. The equidistantly distributed foam blocks expand and carbonize after being heated, forming a highly efficient heat insulation and oxygen barrier. It not only absorbs heat but also isolates oxygen. This dual effect prevents the temperature of the metal hose from rising rapidly, thus providing reliable protection for the internal optical fiber unit. Furthermore, the carbon fiber skeleton, as a structural reinforcement, tightly wraps the metal hose, significantly improving the overall tensile strength and anti-flattening ability of the optical cable.

[0013] This invention utilizes a ring-shaped grooved damping pad made of elastic rubber material. Through its own elastic deformation, the damping pad can absorb and disperse externally applied stress. The grooves on its surface further increase the friction between the pad and the internal carbon fiber skeleton, ensuring that external forces can be effectively transmitted and buffered between layers. This prevents interlayer slippage, maintains the integrity and stability of the optical cable structure, enhances the tensile deformation resistance of the optical cable, and improves its durability and reliability in complex installation environments.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the flexible optical cable;

[0016] Figure 2 This is a schematic diagram of the hose and its frame.

[0017] Figure 3 This is a schematic diagram of the structure of the outer sheath and the damping pad;

[0018] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0019] In the diagram: 1. Flexible tube; 101. Fiber optic unit; 2. Skeleton; 201. Through hole; 3. Foam block; 4. Outer sheath; 401. Reserved groove; 5. Damping pad; 501. Groove; 6. Water-blocking yarn. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a flame-retardant and tensile-resistant indoor flexible optical cable, including a flexible tube 1, which is made of metal. An optical fiber unit 101 is installed inside the flexible tube 1. Water-blocking yarn 6 is filled in the gap between the optical fiber unit 101 and the flexible tube 1. The water-blocking yarn 6 can prevent water intrusion and ensure the transmission stability of the flexible optical cable in a humid environment.

[0022] The flexible cable 1 is covered with a skeleton 2, which is made of carbon fiber material and has good high temperature resistance and strength. The skeleton 2 is cylindrical and fits onto the metal flexible cable 1. The skeleton 2 has through holes 201, and foam blocks 3 are placed inside the through holes 201. The foam blocks 3 are flame-retardant polyurethane foam and are distributed in a ring at equal intervals on the skeleton 2. When the outside of the flexible optical cable is burned, the heat is effectively blocked by the skeleton 2 when it is transferred inward. The skeleton 2, made of carbon material, has thermal stability and heat insulation properties, which can significantly slow down the heat conduction process. Moreover, the foam blocks 3 inside the through holes 201 will expand or carbonize after being heated, forming a heat insulation barrier. It not only absorbs heat but also effectively isolates oxygen, preventing the temperature of the metal flexible cable 1 from rising rapidly, thereby protecting the internal optical fiber unit 101 from high temperature damage. In addition, the skeleton 2, as a reinforcing skeleton, improves the overall tensile strength of the flexible optical cable and provides reliable protection for the internal optical fiber unit 101.

[0023] The outer surface of the flexible cable 1 is covered with an outer sheath 4, which is made of flame-retardant polyolefin through extrusion molding. The skeleton 2 is located between the outer sheath 4 and the flexible cable 1. Foam blocks 3 are in contact with the outer surfaces of the flexible cable 1 and the outer sheath 4 respectively. The outer sheath 4 has a pre-reserved groove 401 in a ring shape. Each pre-reserved groove 401 is provided with a damping pad 5. The damping pad 5 is bonded to the pre-reserved groove 401 and is made of elastic rubber material. Each damping pad 5 is in contact with the outer surface of the skeleton 2. The damping pad 5 has a groove 501 to enhance friction and buffering effect. When the outside of the flexible optical cable is burned, the outer sheath 4 plays a basic flame-retardant role and slows down the spread of flames. When stretched, the damping pad 5 absorbs part of the stress through its elastic deformation. The groove 501 structure on its surface increases the friction between it and the skeleton 2 and prevents relative sliding between the layers of the structure.

[0024] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A flame-retardant and tensile-resistant indoor flexible optical cable, comprising a flexible tube (1), characterized in that: The outer surface of the hose (1) is covered with a skeleton (2), and a through hole (201) is provided on the skeleton (2), and a foam block (3) is provided in the through hole (201).

2. A flame retardant stretch resistant indoor flexible optical cable as claimed in claim 1, wherein, The foam blocks (3) are distributed in a ring at equal intervals on the skeleton (2).

3. A flame retardant, stretch resistant, indoor flexible optical cable according to claim 2, characterized in that, The outer surface of the hose (1) is covered with an outer sheath (4), the skeleton (2) is located between the outer sheath (4) and the hose (1), and the foam block (3) contacts the outer surface of the hose (1) and the outer sheath (4) respectively.

4. A flame retardant stretch-resistant indoor flexible optical cable according to claim 3, characterized in that, The outer sheath (4) has a pre-reserved groove (401) in a ring shape. Each pre-reserved groove (401) is provided with a damping pad (5), and each damping pad (5) is in contact with the outer surface of the skeleton (2).

5. A flame retardant, stretch resistant, indoor flexible optical cable according to claim 4, characterized in that The damping pad (5) has a groove (501).

6. The flame-retardant and tensile-resistant indoor flexible optical cable according to claim 1, characterized in that, An optical fiber unit (101) is provided inside the flexible tube (1), and water-blocking yarn (6) is filled between the optical fiber unit (101) and the flexible tube (1).

Images