Flexible loose tube optical cable

Abstract

The utility model discloses a flexible loose tube optical cable, which belongs to the technical field of optical cables and comprises an outer sheath, the inner side of the outer sheath is fixedly sleeved with a plastic-coated steel band, the inner side of the plastic-coated steel band is fixedly sleeved with a water-blocking sleeve, the inner side of the water-blocking sleeve is fixedly sleeved with an outer flexible loose tube, and the outer flexible loose tube is sleeved with an inner flexible loose tube. The inner side of the outer flexible loose tube is provided with a plurality of cable cores. According to the utility model, the outer side of the outer sheath is provided with a plurality of outer arc-shaped seats and stainless steel arc-shaped rods, the outer sheath is supported by the outer arc-shaped seats and the stainless steel arc-shaped rods, and when an optical cable is laid and pulled, the stainless steel arc-shaped rods are contacted with the ground, so that the outer side of the outer sheath is prevented from being scratched; in addition, the stainless steel arc-shaped rod is utilized to increase the pressure resistance of the optical cable, the stainless steel arc-shaped rod is utilized to bear the extrusion force applied to the optical cable, the outer flexible loose tube and the inner flexible loose tube in the optical cable are matched to prevent the optical fiber ribbon from being extruded and deformed, and the practicability of the optical cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cables, and more specifically, to a flexible loose tube optical cable. Background Art

[0002] An optical cable is manufactured to meet the performance specifications of optics, mechanics or environment. It is a communication cable assembly that uses one or more optical fibers placed in a coated sheath as a transmission medium and can be used alone or in groups. An optical cable is mainly composed of optical fibers, a plastic protective sleeve and a plastic outer skin, and is a communication line used to transmit optical signals.

[0003] After retrieval, the utility model patent with the publication number of CN210465782U discloses a flexible optical fiber ribbon loose tube optical cable, which includes an outer sheath and a cable core. The cable core is formed by stranding multiple loose tubes. The loose tube is a flexible loose tube, and a stacked optical fiber ribbon is sleeved inside the flexible loose tube. The optical cable has a small diameter, a large optical fiber capacity, and convenient branching connection. The flexible loose tube not only has the mechanical and corrosion-resistant properties of a conventional loose tube, but also has excellent flexibility and bending properties, so that the loose tube and the optical cable can reach a small bending radius without bending, can be laid in a narrow space, and can better protect the optical fiber unit in the tube, reduce the failure rate of the optical cable line, and improve the reliability of the communication line. It is especially helpful for indoor laying of optical cables. When making a continuous splice and leaving a coil, the required size of the joint box is relatively small, the fiber capacity of the optical cable router is high, and the cost is low. The optical cable also has strong tensile and compressive properties and good waterproof performance, and is suitable for laying and construction in complex indoor and outdoor environments.

[0004] However, the above patent still has the following deficiencies: when the optical cable is pulled during laying and construction, there will be friction between the optical cable and the ground, wall, etc., which is likely to damage the outer sheath on the outside of the optical cable; in addition, when the optical cable is compressed, it will also cause damage to the optical cable. For this reason, we have proposed a flexible loose tube optical cable. Content of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a flexible loose tube optical cable.

[0006] To solve the above problems, the utility model adopts the following technical solutions:

[0007] A flexible loose tube optical cable includes an outer sheath. A steel tape coated with plastic is fixedly sleeved inside the outer sheath. A water-blocking sleeve is fixedly sleeved inside the steel tape coated with plastic. An outer flexible loose tube is fixedly sleeved inside the water-blocking sleeve. A plurality of cable cores are arranged inside the outer flexible loose tube. Two groups of outer arc seats are fixedly connected to the outside of the outer sheath. Stainless steel arc rods are fixedly sleeved on the outside of the two groups of outer arc seats. A sleeve filler is arranged inside the outer flexible loose tube and outside the cable cores.

[0008] As a preferred solution of the present invention, the cable core includes an inner flexible loose tube fixedly sleeved inside the sleeve filler. An optical fiber ribbon is arranged inside the inner flexible loose tube. A water-blocking ointment is arranged inside the inner flexible loose tube and outside the optical fiber ribbon.

[0009] As a preferred solution of the present invention, an operation groove is arranged between the two groups of outer arc seats. A V-shaped groove is opened in the inner cavity of the operation groove on the outside of the outer sheath. A scale is arranged in the inner cavity of the operation groove on the outside of the outer sheath.

[0010] As a preferred solution of the present invention, a central strengthening core is fixedly sleeved in the middle of the sleeve filler inside the cavity of the outer flexible loose tube.

[0011] As a preferred solution of the present invention, the outer sheath is a PE outer sheath or a flame-retardant outer sheath.

[0012] As a preferred solution of the present invention, the plurality of cable cores are arranged in a circumferentially uniform manner with the axis of the outer flexible loose tube as the center.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] In the present invention, a plurality of outer arc seats and stainless steel arc rods are arranged on the outside of the outer sheath. The outer sheath is supported by the outer arc seats and the stainless steel arc rods. When the optical cable is laid and pulled, the stainless steel arc rods are in contact with the ground, avoiding scratches on the outside of the outer sheath. In addition, the stainless steel arc rods are used to increase the pressure resistance of the optical cable, and the stainless steel arc rods bear the extrusion force on the optical cable. At the same time, the outer flexible loose tube and the inner flexible loose tube inside the optical cable are used to avoid the extrusion deformation of the optical fiber ribbon, improving its practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the structure of the outer flexible loose tube of the present invention;

[0017] Figure 3This is a schematic structural diagram of the outer arc-shaped seat of the present utility model.

[0018] Explanation of the reference numerals in the figure:

[0019] 1. Outer sheath; 2. Plastic-coated steel tape; 3. Water-blocking sleeve; 4. Cable core; 5. Outer arc-shaped seat; 7. Stainless steel arc rod; 8. Outer flexible loose tube; 9. Inner flexible loose tube; 10. Water-blocking ointment; 11. Fiber optic ribbon; 12. Sleeve filler; 13. Central strength member; 14. Operation groove; 15. Scale; 16. V-shaped groove. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Embodiment:

[0024] Please refer to Figures 1-3, A flexible loose tube optical cable, comprising an outer sheath 1, a steel tape coated with plastic 2 fixedly sleeved inside the outer sheath 1, a water-blocking sleeve 3 fixedly sleeved inside the steel tape coated with plastic 2, an outer flexible loose tube 8 fixedly sleeved inside the water-blocking sleeve 3, a plurality of cable cores 4 arranged inside the outer flexible loose tube 8, two groups of outer arc seats 5 fixedly connected to the outside of the outer sheath 1, stainless steel arc rods 7 fixedly sleeved on the outside of the two groups of outer arc seats 5, and a sleeve filler 12 arranged inside the outer flexible loose tube 8 and outside the cable cores 4.

[0025] In this embodiment, the stainless steel arc rod 7 is used to increase the wear resistance of the outside of the optical cable. In addition, the plurality of outer arc seats 5 will not affect the integrity of the optical cable.

[0026] Specifically, please refer to Figure 1 and Figure 2 , The cable core 4 includes an inner flexible loose tube 9 fixedly sleeved inside the sleeve filler 12, an optical fiber ribbon 11 arranged inside the inner flexible loose tube 9, and a water-blocking ointment 10 arranged inside the inner flexible loose tube 9 and outside the optical fiber ribbon 11.

[0027] In this embodiment, the outer flexible loose tube 8 and the inner flexible loose tube 9 can be made of TPEE material. The outer flexible loose tube 8 and the inner flexible loose tube 9 are used to prevent the optical fiber ribbon 11 from being extruded and deformed, thus affecting the signal transmission quality.

[0028] Specifically, please refer to Figure 2 and Figure 3 , An operation groove 14 is arranged between the two groups of outer arc seats 5. A V-shaped groove 16 is opened in the inner cavity of the outer sheath 1 and located at the operation groove 14, and a scale 15 is arranged in the inner cavity of the outer sheath 1 and located at the operation groove 14.

[0029] In this embodiment, the V-shaped groove 16 is used to facilitate the opening and branching of the optical cable, so as to connect the optical cable. The scale 15 is used to control the length of the optical cable.

[0030] Specifically, please refer to Figure 2 , A central strengthening core 13 is fixedly sleeved in the middle of the sleeve filler 12 inside the inner cavity of the outer flexible loose tube 8.

[0031] In this embodiment, the central strengthening core 13 is used to increase the tensile strength of the optical cable.

[0032] Specifically, please refer to Figure 1 , The outer sheath 1 is a PE outer sheath or a flame-retardant outer sheath.

[0033] In this embodiment, the PE outer sheath enables the optical cable to have good mechanical strength, toughness, heat resistance, insulation and chemical stability. The flame-retardant outer sheath can enable the optical cable to have good flame retardancy.

[0034] Specifically, please refer to Figure 1 , with the axes of multiple flexible loose tubes 8 other than the cable cores 4 arranged evenly in a circle with the center of the circle being the axis of the flexible loose tube 8.

[0035] In this embodiment, it is ensured that multiple inner flexible loose tubes 9 and fiber optic ribbons 11 are evenly distributed in the outer flexible loose tube 8.

[0036] Working principle: When the optical cable is laid and pulled, the stainless steel arc-shaped rod 7 on the outer side of the outer sheath 1 and the outer arc-shaped seat 5 are used to support the optical cable, while preventing scratches on the outer side of the outer sheath 1. Additionally, through the cooperation of the inner flexible loose tube 9 and the water-blocking grease 10, the fiber optic ribbon 11 is prevented from being extruded and deformed. Through the cooperation of the outer flexible loose tube 8 and the tube filler 12, multiple inner flexible loose tubes 9 are prevented from being extruded and deformed. Additionally, the optical cable is supported by the stainless steel arc-shaped rod 7 on the outer side of the outer sheath 1. When the optical cable is compressed, the stainless steel arc-shaped rod 7 bears the compressive force received, so as to ensure the use stability of the optical cable. Additionally, the central strength member 13 is used to ensure the tensile strength of the optical cable, and the water-blocking sleeve 3 is used to prevent water from entering the inside of the optical cable. That's all.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A flexible loose tube optical cable, comprising an outer sheath (1), characterized in that: The inner side of the outer sheath (1) is fixedly sleeved with a plastic-coated steel belt (2), the inner side of the plastic-coated steel belt (2) is fixedly sleeved with a water-blocking sleeve (3), the inner side of the water-blocking sleeve (3) is fixedly sleeved with an outer flexible loose sleeve (8), a plurality of cable cores (4) are arranged on the inner side of the outer flexible loose sleeve (8), the outer side of the outer sheath (1) is fixedly connected with two groups of outer arc seats (5), the outer sides of the two groups of outer arc seats (5) are fixedly sleeved with stainless steel arc rods (7), and a sleeve filler (12) is arranged on the inner side of the outer flexible loose sleeve (8) and on the outer side of the cable core (4).

2. A flexible loose tube optical cable according to claim 1, characterized in that: The cable core (4) comprises an inner flexible loose tube (9) fixedly sleeved inside a tube filler (12), an optical fiber ribbon (11) being arranged on the inner side of the inner flexible loose tube (9), and a water-blocking grease (10) being arranged on the inner side of the inner flexible loose tube (9) and on the outer side of the optical fiber ribbon (11).

3. A flexible loose tube optical cable according to claim 2, characterized in that: An operating groove (14) is provided between the two groups of the outer arc-shaped seats (5), a V-shaped groove (16) is provided on the outside of the outer sheath (1) and in the inner cavity of the operating groove (14), and a scale (15) is provided on the outside of the outer sheath (1) and in the inner cavity of the operating groove (14).

4. A flexible loose tube optical cable according to claim 1, characterized in that: A central reinforcing core (13) is fixedly sleeved in the inner cavity of the outer flexible loose sleeve (8) and in the middle of the sleeve filler (12).

5. A flexible loose tube optical cable according to claim 1, characterized in that: The outer sheath (1) is a PE outer sheath or a flame retardant outer sheath.

6. A flexible loose tube optical cable according to claim 2, characterized in that: The plurality of cable cores (4) are evenly arranged in a circle with the axis of the flexible loose tube (8) as the center.

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