Stranded optical cable with flame-retardant fireproof layer
By using low-smoke, halogen-free flame retardant materials, internal steel strips and glass yarns, water-blocking structures and heat-absorbing capsules in the outer sheath of the optical cable, the problem of smoke and heat conduction of optical cables in fires is solved, and the flame retardant, waterproofing and mechanical strength are improved.
Patent Information
- Application Number
- CN202422630838.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-30
AI Technical Summary
When optical cables burn in fire, they generate toxic smoke and conduct heat, resulting in internal damage, making it difficult for the prior art to effectively retardant and insulated.
The outer sheath is made of low-smoke, halogen-free flame-retardant polyolefin material, with steel strips and glass yarns inside to enhance mechanical strength, waterproof belts and waterproof yarns inside to protect the optical fiber, central reinforcement and loose sleeves protect the optical fiber, and heat absorption capsules are filled with paraffin to absorb heat.
Effectively flame retardant, reduce harmful smoke emissions, prevent heat conduction, protect the internal structure of optical cables, and enhance mechanical strength and waterproof performance.
Smart Images
Figure CN223244860U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of optical cable protection, and specifically relates to a twisted optical cable with a flame retardant and fire resistant layer. Background Art
[0002] Optical cables are manufactured to meet optical, mechanical or environmental performance specifications. They are communication cable assemblies that use one or more optical fibers placed in a sheath as transmission media and can be used individually or in groups.
[0003] Optical cables are more widely used in important engineering facilities such as subways, tunnels, and large buildings, as well as crowded places such as exhibition centers and large supermarkets. When a fire occurs, the optical cables will produce various toxic fumes when burning, causing loss of life and property. In addition, the heat generated by the combustion can easily be transferred into the interior of the cable, causing damage to the cable, which can easily lead to internal damage of the cable and termination of cable operation.
[0004] In order to solve the above problems, the present application proposes a stranded optical cable with a flame retardant and fire resistant layer. Utility Model Content
[0005] In response to the problems in the related art, the present invention proposes a twisted optical cable with a flame retardant and fire resistant layer to overcome the above technical problems existing in the existing related art.
[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0007] A stranded optical cable with a flame-retardant and fire-resistant layer comprises an outer sheath, the inner side wall of the outer sheath being laminated with a steel belt, the inner side wall of the steel belt being laminated with glass yarn, the inner side wall of the glass yarn being laminated with a water-blocking tape, the inner side wall of the water-blocking tape being laminated with water-blocking yarn, the inner side wall of the water-blocking yarn being filled with cable paste, a loose tube being provided inside the cable paste, a central reinforcement being provided at the inner center of the cable paste, a colored optical fiber being provided inside the loose tube, an installation groove being provided on the inner side wall of the outer sheath, a heat-absorbing capsule being provided on the outer sheath via the installation groove, and the interior of the heat-absorbing capsule being filled with paraffin.
[0008] Preferably, twelve colored optical fibers are provided, and the twelve colored optical fibers are blue, orange, green, brown, gray, white, red, black, yellow, purple, pink and cyan respectively.
[0009] By setting up colored optical fibers, it is possible to color the colored optical fibers with optical fiber ink, making it easier to distinguish between multiple colored optical fibers.
[0010] Preferably, six groups of the loose tubes and colored optical fibers are provided, and the six groups of the loose tubes and colored optical fibers are wound around the outer side wall of the central reinforcement.
[0011] By setting up loose tubes and colored optical fibers, six groups of loose tubes and colored optical fibers are set up inside the water-blocking yarn, and the inside of the water-blocking yarn is filled with cable paste to protect the loose tubes and the central reinforcement.
[0012] Preferably, the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin, the steel strip is made of galvanized steel strip, and the glass yarn is made of glass fiber.
[0013] By setting up an outer sheath, steel belt and glass yarn, the outer sheath can protect the internal structure of the cable from the influence of the external environment, reduce the emission of harmful smoke and gas generated in the event of a fire, and the steel belt can enhance the mechanical strength and resistance to lateral pressure of the cable, while the glass yarn can enhance the tensile strength and impact resistance of the cable.
[0014] Preferably, the water-blocking tape is a composite material of water-swellable rubber and non-woven fabric, and the water-blocking yarn is made of super absorbent fiber.
[0015] By arranging water-blocking tape and water-blocking yarn, it is achieved that by arranging water-blocking tape and water-blocking yarn inside the glass yarn, the water-blocking tape and water-blocking yarn can quickly expand to form a water-proof layer when the cable is damp or soaked in water, thereby preventing further penetration of moisture.
[0016] Preferably, the inner side wall of the loose tube is filled with fiber paste.
[0017] By setting the fiber paste, it is achieved that by filling the loose tube with fiber paste, it is used to protect the colored optical fiber, prevent the colored optical fiber from being mechanically damaged, and provide a certain buffering effect.
[0018] To sum up, the technical effects and advantages of the utility model are as follows: the twisted optical cable with a flame retardant and fire resistant layer is formed by extruding an outer sheath on the outer side wall of the cable, and the outer sheath is made of low-smoke halogen-free flame retardant polyolefin material. When a fire occurs outside the cable, the outer sheath effectively makes the cable flame retardant and fire resistant, reducing the generation of harmful smoke and gas emissions when a fire occurs, and a heat absorbing capsule is provided inside the outer sheath, so that the paraffin inside the heat absorbing capsule can absorb external heat, effectively preventing heat from being conducted into the interior of the cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;
[0020] Figure 2 This is a schematic diagram of the utility model loose tube and its related structures;
[0021] Figure 3This is a schematic diagram of the cross-sectional structure of the utility model;
[0022] Figure 4 This is a schematic diagram of the paraffin wax and its related structures of the utility model.
[0023] In the figure: 1. Outer sheath; 2. Steel tape; 3. Glass yarn; 4. Water-blocking tape; 5. Water-blocking yarn; 6. Cable paste; 7. Center strength member; 8. Loose tube; 9. Fiber paste; 10. Colored optical fiber; 11. Mounting slot; 12. Heat-absorbing capsule; 13. Paraffin wax. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0025] Reference Figure 1-4 A stranded optical cable with a flame retardant and fire resistant layer includes an outer sheath 1, a steel belt 2 is laminated to the inner wall of the steel belt 2, a glass yarn 3 is laminated to the inner wall of the glass yarn 3, a water blocking tape 4 is laminated to the inner wall of the water blocking tape 4, a water blocking yarn 5 is laminated to the inner wall of the water blocking yarn 5, a cable paste 6 is filled with a loose tube 8 inside the cable paste 6, a central reinforcement member 7 is provided at the center of the cable paste 6, a colored optical fiber 10 is provided inside the loose tube 8, an installation groove 11 is opened on the inner wall of the outer sheath 1, a heat absorbing capsule 12 is provided on the outer sheath 1 through the installation groove 11, and the heat absorbing capsule 12 is filled with paraffin wax 13 The steel tape 2 and glass yarn 3 are wrapped around the outer wall of the water-blocking tape 4 to improve the tensile strength of the cable, and the water-blocking tape 4 and water-blocking yarn 5 are used to improve the waterproof performance of the cable. The outer sheath 1 extruded on the outer wall of the cable can form a flame-retardant and fire-resistant layer for the cable, effectively protecting the cable and preventing it from being damaged by fire. A heat-absorbing capsule 12 is provided inside the outer sheath 1, and the interior of the heat-absorbing capsule 12 is filled with half paraffin wax 13. When the external temperature of the cable rises, the paraffin wax 13 melts and absorbs a large amount of heat, thereby effectively preventing heat from being conducted into the interior of the cable, thereby protecting the colored optical fiber 10 inside the cable.
[0026] Reference Figure 1-3 There are twelve colored optical fibers 10, and the twelve colored optical fibers 10 are respectively blue, orange, green, brown, gray, white, red, black, yellow, purple, pink and cyan. By using different colors of optical fiber ink to color the twelve colored optical fibers 10 respectively, it is convenient to distinguish different colored optical fibers 10 and avoid connection errors of the colored optical fibers 10.
[0027] Reference Figure 2Six groups of loose tubes 8 and colored optical fibers 10 are provided, and the six groups of loose tubes 8 and colored optical fibers 10 are wound around the outer wall of the central strength member 7. By winding the six groups of loose tubes 8 and colored optical fibers 10 around the outer wall of the central strength member 7, and filling the six groups of loose tubes 8 with cable paste 6, the loose tubes 8 are kept stable inside, so that the optical cable has excellent mechanical properties such as tensile strength, bending resistance, torsion resistance, and impact resistance.
[0028] Reference Figure 1-3 The outer sheath 1 is made of low-smoke halogen-free flame-retardant polyolefin, the steel belt 2 is made of galvanized steel belt 2, and the glass yarn 3 is made of glass fiber. The outer sheath 1 is made of low-smoke halogen-free flame-retardant polypropylene, thereby improving the fire resistance of the outer sheath 1 to the cable, and effectively providing fire-resistant and flame-retardant protection for the cable. The steel belt 2 and glass yarn 3 improve the mechanical strength, lateral pressure resistance, tensile strength and impact resistance of the cable, thereby better protecting the cable.
[0029] Reference Figure 1-3 The water-blocking tape 4 is a composite material of water-swelling rubber and non-woven fabric, and the water-blocking yarn 5 is made of super absorbent fiber. The water-blocking tape 4 and the water-blocking yarn 5 are installed inside the glass yarn 3, so that the water-blocking tape 4 and the water-blocking yarn 5 can improve the waterproof performance of the cable. When the cable is damp or soaked in water, the water-blocking tape 4 and the water-blocking yarn 5 can quickly expand to form a waterproof layer to prevent further penetration of moisture, thereby protecting the colored optical fiber 10 inside the cable and preventing water from entering the interior and causing a short circuit.
[0030] Reference Figure 1-3 The inner wall of the loose tube 8 is filled with fiber paste 9, and the colored optical fiber 10 can be limited by the fiber paste 9 filled inside the loose tube 8. The fiber paste 9 is a special ointment for colored optical fiber 10 with long-term stable chemical and physical properties, appropriate viscosity, excellent waterproof performance, and long-term good protection performance for the colored optical fiber 10. It is also completely compatible with the material of the loose tube 8. It is used to protect the colored optical fiber 10, prevent the colored optical fiber 10 from mechanical damage, and provide a certain buffering effect.
[0031] Working principle: twelve colored optical fibers 10 are installed inside the loose tube 8, and the loose tube 8 is filled with fiber paste 9, six groups of loose tubes 8 are arranged around the outer side wall of the central reinforcement 7 at the inner center of the water-blocking yarn 5, and filled with cable paste 6, and the outer side walls of the water-blocking yarn 5 are respectively provided with a water-blocking tape 4, a glass yarn 3, a steel belt 2, and an outer sheath 1, so that the loose tube 8 arranged inside can be effectively protected, and a heat-absorbing capsule 12 is provided inside the outer sheath 1, so that when the cable is caught in a fire, the outer sheath 1 is used for fireproofing and flame retardancy, and the heat generated by the fire is absorbed by the paraffin 13 filled in the heat-absorbing capsule 12. The paraffin 13 absorbs a large amount of heat when undergoing phase change, thereby effectively preventing heat from entering the interior of the cable, thereby protecting the cable.
[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A stranded optical cable with a flame retardant and fire resistant layer, comprising an outer sheath (1), characterized in that: The inner side wall of the outer sheath (1) is bonded with a steel belt (2), the inner side wall of the steel belt (2) is bonded with a glass yarn (3), the inner side wall of the glass yarn (3) is bonded with a water-blocking tape (4), the inner side wall of the water-blocking tape (4) is bonded with a water-blocking yarn (5), the inner side wall of the water-blocking yarn (5) is filled with a cable paste (6), a loose tube (8) is provided inside the cable paste (6), a central reinforcement member (7) is provided at the inner center of the cable paste (6), a colored optical fiber (10) is provided inside the loose tube (8), an installation groove (11) is opened on the inner side wall of the outer sheath (1), a heat-absorbing capsule (12) is provided on the outer sheath (1) through the installation groove (11), and the heat-absorbing capsule (12) is filled with paraffin wax (13).
2. The stranded optical cable with a flame retardant and fire resistant layer according to claim 1, characterized in that: Twelve colored optical fibers (10) are provided, and the twelve colored optical fibers (10) are blue, orange, green, brown, gray, white, red, black, yellow, purple, pink, and cyan, respectively.
3. The stranded optical cable with a flame retardant and fire resistant layer according to claim 1, characterized in that: Six groups of the loose tubes (8) and colored optical fibers (10) are provided, and the six groups of the loose tubes (8) and colored optical fibers (10) are wound around the outer side wall of the central reinforcement member (7).
4. The stranded optical cable with a flame retardant and fire resistant layer according to claim 1, characterized in that: The outer sheath (1) is made of low-smoke, halogen-free, flame-retardant polyolefin, the steel strip (2) is made of a galvanized steel strip (2), and the glass yarn (3) is made of glass fiber.
5. The stranded optical cable with a flame retardant and fire resistant layer according to claim 1, characterized in that: The water-blocking tape (4) is a composite material of water-swelling rubber and non-woven fabric, and the water-blocking yarn (5) is made of super absorbent fiber.
6. The stranded optical cable with a flame retardant and fire resistant layer according to claim 1, characterized in that: The inner side wall of the loose tube (8) is filled with fiber paste (9).