Indoor flexible optical cable
By incorporating spiral cuts and reinforcing fiber layers into the outer sheath of the optical cable, the problem of poor flexibility in optical cables is solved, enabling flexible cabling in indoor environments and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-07
AI Technical Summary
Existing optical cables have poor flexibility when laid indoors, which leads to damage and cracking of the outer sheath when bent significantly, affecting signal transmission speed, accuracy and service life.
Design an indoor flexible optical cable, including an optical fiber unit, a high-temperature resistant layer, an outer sheath, and a fireproof layer. The outer sheath has a spiral cut with a spiral angle of 30° to 60° and a depth of 1/3 to 1/2 of the outer sheath thickness. The reinforcing fiber layer is located between the high-temperature resistant layer and the outer sheath and is made of glass fiber, carbon fiber, or aramid fiber.
It improves the flexibility and bending resistance of optical cables in complex indoor environments, reduces the risk of outer sheath cracking, ensures signal transmission speed and accuracy, and extends service life.
Smart Images
Figure CN224096053U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical cable manufacturing technology, and in particular to an indoor flexible optical cable. Background Technology
[0002] With the development of the communications industry, fiber optic communication has gradually become the mainstream transmission method in modern communication networks. As a core component of fiber optic communication, the performance and reliability of optical cables are crucial to communication quality. Most existing optical cables are laid outdoors, placing greater emphasis on mechanical and environmental resistance, resulting in relatively poor flexibility.
[0003] With the continuous implementation of industry applications and the ongoing upgrade of fixed network infrastructure, the demand for indoor fiber optic cable laying is gradually increasing. Indoor environments are complex and contain many corners, requiring significant bending of the fiber optic cable during installation. Due to the poor flexibility of existing fiber optic cables, significant bending can damage them, affecting the speed and accuracy of signal transmission. Furthermore, the increased stress at the bending points after bending increases the risk of outer sheath cracking, impacting the cable's lifespan.
[0004] Therefore, there is an urgent need for an indoor flexible optical cable to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this utility model is to provide an indoor flexible optical cable that can solve the problems of poor flexibility of existing optical cables. When laying optical cables indoors, it is necessary to bend the optical cables significantly, which can damage the optical cables, affect the speed and accuracy of signal transmission, and increase the risk of cracking of the outer sheath after bending, thus affecting the service life of the optical cables.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] An indoor flexible optical cable includes:
[0008] An optical fiber unit and a high-temperature resistant layer, wherein the high-temperature resistant layer covers the outer periphery of the optical fiber unit;
[0009] An outer protective layer, which covers the outer periphery of the high-temperature resistant layer, is provided with a spiral cut.
[0010] A fire-resistant layer is applied to the outer periphery of the outer protective layer.
[0011] As a preferred technical solution for indoor flexible optical cables, the spiral angle of the spiral cut is 30° to 60°.
[0012] As a preferred technical solution for indoor flexible optical cables, the depth of the spiral cut is 1 / 3 to 1 / 2 of the thickness of the outer sheath.
[0013] As a preferred technical solution for indoor flexible optical cables, the indoor flexible optical cable further includes a reinforcing fiber layer, which is located between the high-temperature resistant layer and the outer sheath.
[0014] As a preferred technical solution for indoor flexible optical cables, the fiber density of the reinforcing fiber layer is 10 fibers / mm². 2 ~20 roots / mm 2 .
[0015] As a preferred technical solution for indoor flexible optical cables, the reinforcing fiber layer is made of glass fiber, carbon fiber, or aramid fiber.
[0016] As a preferred technical solution for indoor flexible optical cables, the high-temperature resistant layer is made of silicone rubber or modified polytetrafluoroethylene.
[0017] As a preferred technical solution for indoor flexible optical cables, the thickness of the high-temperature resistant layer is 0.5mm to 1.5mm.
[0018] As a preferred technical solution for indoor flexible optical cables, the thickness of the fireproof layer is 0.2mm to 0.5mm.
[0019] As a preferred technical solution for indoor flexible optical cables, the outer sheath is made of polytetrafluoroethylene.
[0020] The beneficial effects of this utility model are as follows:
[0021] The indoor flexible optical cable provided by this utility model effectively reduces the rigidity of the outer sheath by setting a spiral cut, making the indoor flexible optical cable more flexible when bent. This prevents damage when the indoor flexible optical cable is laid in complex indoor environments and at corners, ensuring the signal transmission speed and accuracy of the indoor flexible optical cable. At the same time, the spiral cut can disperse the stress on the outer sheath when the indoor flexible optical cable is bent, reducing the risk of cracking and enabling repeated use, thus extending the service life of the indoor flexible optical cable. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of the indoor flexible optical cable provided by this utility model;
[0023] Figure 2 This is a flowchart of the preparation method of the indoor flexible optical cable provided by this utility model.
[0024] In the picture:
[0025] 1. Fiber optic unit; 2. High-temperature resistant layer; 3. Reinforcing fiber layer; 4. Outer sheath; 41. Spiral cut. Detailed Implementation
[0026] The present invention 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 merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0030] like Figure 1As shown in the illustration, this embodiment provides an indoor flexible optical cable, including an optical fiber unit 1, a high-temperature resistant layer 2, an outer sheath 4, and a fire-resistant layer. The high-temperature resistant layer 2 covers the outer periphery of the optical fiber unit, enabling stable signal transmission in high-temperature environments and improving the versatility of the indoor flexible optical cable. The outer sheath 4 covers the outer periphery of the high-temperature resistant layer 2, ensuring the indoor flexible optical cable has abrasion resistance and compression resistance, thus guaranteeing its service life. The outer sheath 4 has a spiral cut 41, which reduces the rigidity of the outer sheath 4, making the indoor flexible optical cable more flexible when bent. This prevents damage when the indoor flexible optical cable is laid in complex indoor environments and at corners, ensuring the signal transmission speed and accuracy of the indoor flexible optical cable. Simultaneously, the spiral cut 41 disperses the stress on the outer sheath 4 when the indoor flexible optical cable is bent, improving the bending resistance of the indoor flexible optical cable, reducing the risk of cracking of the outer sheath 4, and extending the service life of the indoor flexible optical cable. The fireproof layer is coated on the outer periphery of the outer sheath 4. Existing fireproof materials have both fireproof and waterproof properties. Therefore, the fireproof layer not only makes the indoor flexible optical cable fireproof, but also waterproof, thus improving the safety of the indoor flexible optical cable.
[0031] Furthermore, by setting a spiral cutout 41 on the outer sheath 4, the surface area of the outer sheath 4 is increased, which is more conducive to the heat dissipation of the optical fiber unit 1, thereby further improving the speed and accuracy of signal transmission of the indoor flexible optical cable in high-temperature environments.
[0032] Preferably, the helix angle of the spiral cut 41 is 30° to 60°. When the helix angle of the spiral cut 41 is less than 30°, the cuts on the outer sheath 4 are densely distributed, which not only makes the processing of the spiral cut 41 inconvenient, but also causes excessive stretching of the cuts when the indoor flexible optical cable is bent, increasing the risk of cracking of the outer sheath 4 and affecting its service life. When the helix angle of the spiral cut 41 is greater than 60°, the spiral cuts 41 are sparsely distributed, which cannot guarantee the flexibility of the outer sheath 4, and thus cannot guarantee the flexibility of the indoor flexible optical cable. Therefore, setting the helix angle of the spiral cut 41 on the outer sheath 4 to 30° to 60° allows the indoor flexible optical cable to simultaneously consider flexibility and mechanical properties, improving the rationality of the indoor flexible optical cable design.
[0033] Preferably, the depth of the spiral cut 41 is 1 / 3 to 1 / 2 of the thickness of the outer sheath 4. When the depth of the spiral cut 41 is less than 1 / 3 of the thickness of the outer sheath 4, the improvement in the flexibility of the outer sheath 4 is limited, and the indoor flexible cable may not meet the requirements of corner wiring. When the depth of the spiral cut 41 is greater than 1 / 2 of the thickness of the outer sheath 4, the stress on the outer sheath 4 will be concentrated at the root of the cut when the indoor flexible optical cable is bent, which will accelerate the aging of the outer sheath 4 and thus affect the service life of the indoor flexible optical cable. Therefore, designing the depth of the spiral cut 41 to be 1 / 3 to 1 / 2 of the thickness of the outer sheath 4 can ensure the flexibility of the indoor flexible optical cable while avoiding stress concentration at the cut on the outer sheath 4 after the indoor flexible optical cable is laid, thus further ensuring the service life of the indoor flexible optical cable. Furthermore, a cutting depth of 1 / 3 to 1 / 2 is a common industrial standard. The spiral cut 41 can be processed quickly using CNC cutting equipment or laser cutting equipment, thereby improving the processing efficiency of indoor flexible optical cables.
[0034] In this embodiment, the indoor flexible optical cable also includes a reinforcing fiber layer 3, which is located between the high-temperature resistant layer 2 and the outer sheath 4. The inclusion of the reinforcing fiber layer 3 improves the mechanical properties of the indoor flexible optical cable without affecting its flexibility, thereby further extending its service life. Simultaneously, when the outer sheath material is extruded over the reinforcing fiber layer 3, the outer sheath 4 adheres to the reinforcing fiber layer 3, preventing stress concentration in the reinforcing fiber layer 3 at bends and further improving the mechanical properties of the indoor flexible optical cable during bending. Furthermore, the braiding density of the reinforcing fiber layer 3 is 10 strands / mm. 2 ~20 roots / mm 2 If the weaving density of the reinforcing fiber layer 3 is less than 10 fibers / mm 2 The improvement in mechanical properties of indoor flexible optical cables is not significant, and the service life of indoor flexible optical cables cannot be extended. If the braiding density of reinforcing fiber layer 3 is greater than 20 strands / mm... 2 This will reduce the flexibility of the fiber layer, affecting the flexibility of the outer sheath 4, and consequently the flexibility of the indoor flexible optical cable. Therefore, the braiding density of the reinforcing fiber layer 3 is designed to be 10 strands / mm. 2 ~20 roots / mm 2 This approach can improve the mechanical properties of indoor flexible optical cables while maintaining their flexibility, thereby further enhancing the rationality of indoor flexible optical cable design.
[0035] In this embodiment, the material of the reinforcing fiber layer 3 can be glass fiber, carbon fiber or aramid fiber, and no specific limitation is made here.
[0036] In this embodiment, the high-temperature resistant layer 2 is made of silicone rubber or modified polytetrafluoroethylene (PTFE). Silicone rubber possesses excellent high-temperature resistance and elasticity, enabling the high-temperature resistant layer 2 to protect the optical fiber unit 1 in high-temperature environments, ensuring stable signal transmission of the indoor flexible optical cable. Furthermore, when the indoor flexible optical cable is bent, the high-temperature resistant layer 2, due to its excellent elasticity, remains in contact with the optical fiber unit 1 and the outer sheath 4, resulting in uniform stress distribution at the bend and further improving the cable's lifespan. Modified PTFE also exhibits excellent high-temperature resistance and elasticity, enabling stable signal transmission of the indoor flexible optical cable in high-temperature environments. Moreover, when bent, the high-temperature resistant layer 2 remains in contact with the optical fiber unit 1 and the outer sheath 4, further extending the cable's lifespan. No specific restrictions are placed on the choice of material for the high-temperature resistant layer 2.
[0037] Furthermore, the thickness of the high-temperature resistant layer 2 is 0.5mm to 1.5mm. If the high-temperature resistant layer 2 is too thin, it cannot protect the optical fiber unit 1 in a high-temperature environment, which will affect the efficiency and accuracy of the transmission signal of the optical fiber unit 1. If the high-temperature resistant layer 2 is too thick, it will affect the overall flexibility of the indoor flexible optical cable, thereby affecting the user experience of the indoor flexible optical cable. The specific thickness of the high-temperature resistant layer 2 can be selected according to the specifications and flexibility requirements of the indoor flexible optical cable, and no specific limitation is made here.
[0038] In this embodiment, the thickness of the fireproof layer is 0.2mm to 0.5mm. The specific thickness of the fireproof layer can be selected according to the specifications of the indoor flexible optical cable, and no specific limitation is made here. The fireproof coating in the fireproof layer can be silicone fireproof coating, polyurethane fireproof coating, or alkyd resin fireproof coating, and no specific limitation is made here.
[0039] Furthermore, the present invention will be described in conjunction with specific embodiments.
[0040] Example 1
[0041] When the high-temperature resistant layer 2 in the indoor flexible optical cable is made of silicone rubber and the reinforcing fiber layer 3 is made of aramid fiber, the spiral angle of the spiral cut 41 on the outer sheath 4 is 45° and the depth of the spiral cut 41 is 1 / 2 of the thickness of the outer sheath 4.
[0042] Example 2
[0043] When the high-temperature resistant layer 2 in the indoor flexible optical cable is made of modified polytetrafluoroethylene and the reinforcing fiber layer 3 is made of glass fiber, the spiral angle of the spiral cut 41 on the outer sheath 4 is 30° and the depth of the spiral cut 41 is 1 / 3 of the thickness of the outer sheath 4.
[0044] like Figure 2As shown in the illustration, this embodiment provides a preparation method for preparing indoor flexible optical cables. The preparation method for indoor flexible optical cables includes the following steps:
[0045] Step 1: Coat the outer periphery of the optical fiber unit 1 with a high-temperature resistant material to form a high-temperature resistant layer 2. Specifically, silicone rubber or modified polytetrafluoroethylene is extruded and coated onto the outer periphery of the optical fiber unit 1 using an extruder to form the high-temperature resistant layer 2.
[0046] Step 2: Extrude the outer protective material to cover the outer periphery of the high-temperature resistant layer 2 to form the outer protective layer 4. Specifically, the outer protective layer 4 is made of polytetrafluoroethylene (PTFE). During the processing of the outer protective layer 4, the PTFE material is extruded and covered to cover the outer periphery of the high-temperature resistant layer 2 using an extruder to form the outer protective layer 4.
[0047] Step 3: Form a spiral cut 41 on the outer periphery of the outer protective layer 4 by machining. Specifically, the spiral cut 41 can be machined on the outer periphery of the outer protective layer 4 using CNC cutting equipment or laser cutting equipment.
[0048] Step 4: Apply fire-retardant material to the outer periphery of the outer protective layer 4 to form a fire-retardant layer. Specifically, the fire-retardant coating can be a silicone fire-retardant coating, a polyurethane fire-retardant coating, or an alkyd resin fire-retardant coating.
[0049] Furthermore, the following steps are included between step 1 and step 2:
[0050] Step 10: A fiber braided sheath is fitted around the outer periphery of the inner sheath to form the reinforcing fiber layer 3. The addition of the reinforcing fiber layer 3 further improves the mechanical properties of the indoor flexible optical cable and extends its service life.
[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An indoor flexible optical cable, characterized in that, include: The optical fiber unit (1) and the high temperature resistant layer (2) are wrapped around the outer periphery of the optical fiber unit (1); Outer protective layer (4), the outer protective layer (4) covers the outer periphery of the high temperature resistant layer (2), and the outer protective layer (4) is provided with a spiral cut (41); A fireproof layer is applied to the outer periphery of the outer protective layer (4).
2. The indoor flexible optical cable according to claim 1, characterized in that, The spiral angle of the spiral cut (41) is 30° to 60°.
3. The indoor flexible optical cable according to claim 2, characterized in that, The depth of the spiral cut (41) is 1 / 3 to 1 / 2 of the thickness of the outer protective layer (4).
4. The indoor flexible optical cable according to claim 1, characterized in that, The indoor flexible optical cable also includes a reinforcing fiber layer (3), which is located between the high-temperature resistant layer (2) and the outer sheath (4).
5. The indoor flexible optical cable according to claim 4, characterized in that, The fiber density of the reinforcing fiber layer (3) is 10 fibers / mm². 2 ~20 roots / mm 2 .
6. The indoor flexible optical cable according to claim 5, characterized in that, The reinforcing fiber layer (3) is made of glass fiber, carbon fiber or aramid fiber.
7. The indoor flexible optical cable according to claim 1, characterized in that, The high-temperature resistant layer (2) is made of silicone rubber or modified polytetrafluoroethylene.
8. The indoor flexible optical cable according to claim 7, characterized in that, The thickness of the high-temperature resistant layer (2) is 0.5mm to 1.5mm.
9. The indoor flexible optical cable according to any one of claims 1-8, characterized in that, The thickness of the fireproof layer is 0.2mm to 0.5mm.
10. The indoor flexible optical cable according to any one of claims 1-8, characterized in that, The outer protective layer (4) is made of polytetrafluoroethylene.