Flexible rat-bite-proof flame-retardant optical cable

Abstract

The utility model discloses a flexible rat-bite-proof flame-retardant optical cable, which enables the optical cable to have flexible performance, can reliably prevent rat bite, and ensures the reliable service life of the optical cable. The cable comprises a cable core part, the cable core part comprises a central reinforcing piece, a plurality of loose tubes and an inner protection layer, the loose tubes are annularly distributed on the outer circumference of the central reinforcing piece in a unidirectional spiral twisting mode, and the inner protection layer wraps the equivalent outer circumference formed by combining the loose tubes; the reinforcing layer part comprises a plurality of nylon rods, and the nylon rods are annularly distributed on the outer circumference of the inner protection layer in a unidirectional spiral twisting mode; and an outer sheath. The periphery of the cable core part is wrapped with the reinforcing layer part, and the periphery of the reinforcing layer part is wrapped with the outer protective layer.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cable structures, and specifically relates to a flexible rat-proof and flame-retardant optical cable. Background Art

[0002] Optical cables play an important role in information and data transmission in various fields. However, optical cables laid underground are extremely vulnerable to being bitten by rats, which can damage the optical cables. Therefore, in the prior art, nylon materials are coated on the outer sheath of the optical cable, or the outer sheath is armored with metal rods or non-metallic tapes. However, such optical cables will make the overall optical cable less flexible, and thus the bending performance becomes worse. Therefore, there is an urgent need to develop a flexible and reliable rat-proof optical cable. Summary of the Invention

[0003] In view of the above problems, the utility model provides a flexible rat-proof and flame-retardant optical cable, which enables the optical cable to have a soft performance and can reliably prevent rats from biting, ensuring the reliable service life of the optical cable.

[0004] A flexible rat-proof and flame-retardant optical cable, characterized in that it comprises:

[0005] A cable core part, which includes a central strengthening member, a plurality of loose tubes, and an inner sheath. The loose tubes are circumferentially arranged around the outer circumference of the central strengthening member in a unidirectional spiral stranding manner, and the inner sheath is coated on the equivalent outer circumference formed by the combination of the loose tubes;

[0006] A strengthening layer part, which includes a plurality of nylon rods. The nylon rods are circumferentially arranged around the outer circumference of the inner sheath in a unidirectional spiral stranding manner;

[0007] And an outer sheath;

[0008] The strengthening layer part is wound around the outer circumference of the cable core part, and the outer sheath is coated on the outer circumference of the strengthening layer part.

[0009] It is further characterized in that:

[0010] The overall equivalent outer circumference formed by the loose tubes is coated with a tape layer, and the inner sheath is coated on the outer circumference of the tape layer;

[0011] The longitudinal section of the nylon rod is circular. At this time, adjacent nylon rods are in close contact to form an imitation ring structure. When the outer sheath is coated, it fills the outer layer gap between adjacent nylon rods, ensuring that the nylon rods and the outer sheath form an integral structure after stranding, and ensuring the stable and reliable positioning of the nylon rods;

[0012] The longitudinal section of the nylon rod is trapezoidal or SZ-shaped, which ensures that the nylon rods enclose to form a ring structure.

[0013] After adopting the structure of the present utility model, a nylon rod is clamped between the inner protective layer and the outer protective layer of this optical cable, which can effectively prevent rat bites, and makes the optical cable itself relatively soft, with significantly improved bending performance; it endows the optical cable with soft performance and can reliably prevent rat bites, ensuring the reliable service life of the optical cable. Brief Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional structure diagram of the first specific embodiment of the present utility model;

[0015] Figure 2 It is a schematic cross-sectional structure diagram of the second specific embodiment of the present utility model;

[0016] Figure 3 It is a schematic cross-sectional structure diagram of the third specific embodiment of the present utility model;

[0017] The names corresponding to the serial numbers in the figure are as follows:

[0018] Cable core part 10, central strengthening member 11, several loose tubes 12, inner protective layer 13, optical fiber 14, fiber paste 15, aluminum-plastic composite tape 16, strengthening layer part 20, nylon rod 21, outer protective layer 30. Detailed Description of the Embodiments

[0019] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it 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 communication inside 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 situations.

[0022] The present utility model creation will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] A flexible rat-proof and flame-retardant optical cable, as shown in Figures 1-3 , which includes a cable core part 10, a strengthening layer part 20, and an outer sheath 30;

[0024] The cable core part 10 includes a central strengthening member 11, a plurality of loose tubes 12, and an inner sheath 13. The loose tubes 12 are circumferentially arranged around the outer circumference of the central strengthening member 11 in a unidirectional spiral stranding manner, and the inner sheath 13 covers the equivalent outer circumference formed by the combination of the loose tubes 12;

[0025] The strengthening layer part 20 includes a plurality of nylon rods 21, and the nylon rods 21 are circumferentially arranged around the outer circumference of the inner sheath 13 in a unidirectional spiral stranding manner;

[0026] The outer circumference of the cable core part 10 is wrapped with the strengthening layer part 20, and the outer circumference of the strengthening layer part 20 is covered with the outer sheath 30.

[0027] In specific implementation, the number of the loose tubes 12 is six. The overall equivalent outer circumference formed by the six equal-diameter loose tubes 12 is covered with a tape layer 16, the outer circumference of the tape layer 16 is covered with the inner sheath 13, the colors of the six loose tubes 12 are different from each other, and the tape layer 16 is specifically formed by winding an aluminum-plastic composite tape.

[0028] Specific Embodiment 1, as shown in Figure 1 : The longitudinal section of the nylon rod 21 is circular. At this time, the adjacent nylon rods 21 are closely attached to form an imitation annular structure. When the outer sheath 30 is covered, it fills the outer layer gap between the adjacent nylon rods 21 to ensure that the nylon rods 21 and the outer sheath 30 form an integral structure after stranding, and ensure the stable and reliable positioning of the nylon rods 21.

[0029] Specific Embodiment 2, as shown in Figure 2 , the longitudinal section of the nylon rod 21 is trapezoidal.

[0030] Specific Embodiment 3, as shown in Figure 3 , the longitudinal section of the nylon rod is SZ-shaped.

[0031] In Specific Embodiments 2 and 3, the shape of the nylon rod 21 ensures that the assembled nylon rods form an annular structure, and ensures the reliable fitting arrangement with the inner sheath and the outer sheath.

[0032] In specific implementation, the materials of the outer sheath 30 and the inner sheath 13 are both low-smoke and halogen-free flame-retardant materials, the intermediate strengthening member 11 is a non-metallic central strengthening member, the corresponding optical fibers 14 and fiber pastes 15 are arranged in the inner cavities of the loose tubes 12, and the material of the nylon rod 21 is specifically PA6 or PA12.

[0033] Its working principle is as follows. A circle of nylon rods is sandwiched between the inner sheath and the outer sheath of this optical cable, which can effectively prevent rats from biting, and makes the optical cable itself relatively soft, with significantly improved bending performance; it makes the optical cable have soft performance and can reliably prevent rats from biting, ensuring the reliable service life of the optical cable.

[0034] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0035] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flexible rat-proof flame-retardant optical cable, characterized in that: It includes: The cable core part includes a central reinforcement member, a plurality of loose tubes, and an inner protective layer. The loose tubes are arranged around the outer circumference of the central reinforcement member in a unidirectional spiral twisted manner, and the inner protective layer is coated on the equivalent outer circumference formed by the combination of the loose tubes; The reinforcement layer includes a plurality of nylon rods which are arranged around the outer circumference of the inner protective layer in a unidirectional spiral twisted manner; and an outer sheath; The outer circumference of the cable core part is wrapped with the reinforcement layer part, and the outer circumference of the reinforcement layer part is covered with the outer protective layer.

2. The flexible rat-proof flame-retardant optical cable according to claim 1, characterized in that: The overall equivalent outer circumference formed by the loose tube is coated with a tape layer, and the outer circumference of the tape layer is coated with the inner protective layer.

3. A flexible rat-proof flame-retardant optical cable according to claim 1 or 2, characterized in that: The longitudinal section of the nylon rod is circular, and the adjacent nylon rods are closely attached to form a pseudo-annular structure. The outer protective layer fills the outer layer gaps of the adjacent nylon rods when covering.

4. A flexible rat-proof flame-retardant optical cable according to claim 1 or 2, characterized in that: The longitudinal section of the nylon rod is trapezoidal or SZ-shaped.

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