Anti-static optical cable

Abstract

The application belongs to the field of photoelectric cables, and particularly relates to an anti-static pressure type photoelectric cable. The anti-static pressure type photoelectric cable comprises a sheath layer, an anti-static pressure framework, an optical fiber core wire and a conductive core wire. The sheath layer is provided with an eye-shaped inner cavity at the axis of the photoelectric cable, and two edge cavities are arranged at the two ends of the tip of the inner cavity. The anti-static pressure framework comprises an arc-shaped cover and an arc-shaped head. The arc-shaped cover is arranged on the inner wall of the inner cavity, and the end part of the arc-shaped cover is arranged in the edge cavity to form the arc-shaped head. The optical fiber core wire is arranged in the inner cavity, and the conductive core wire is arranged in the edge cavity. The application forms a guide force structure like a lever in the photoelectric cable through a specific protection structure. The conductive core wire in the photoelectric cable can be used as the main force bearing part to protect the optical fiber core wire with weak mechanical properties by the strong mechanical properties, and the photoelectric cable has the advantages of convenience in transportation and storage, long service life, and high anti-static pressure capacity after aging and hardening.

Description

Technical Field

[0001] This invention belongs to the field of optical cables, and particularly relates to an anti-static optical cable. Background Technology

[0002] Optical fiber cables are highly integrated cable products that simultaneously deliver power and facilitate communication. In recent years, with the promotion and popularization of simultaneous power transmission technology, optical fiber cables have become increasingly common in order to save on installation costs.

[0003] Currently, the research and development of optical cables mainly focuses on multi-core technology, functionalization, and enhanced environmental adaptability. Enhanced environmental adaptability refers to improving the ability of optical cables to withstand complex environments, particularly strengthening their mechanical properties, such as impact and pressure resistance. Traditional protective structures for optical cables or electrical cables are poorly suited to optical cables, making their development challenging. The main problem lies in the fact that the optical fiber in an optical cable is very fragile, while the wire portion possesses excellent mechanical properties. How to reconcile these two aspects to avoid wasting the performance of the protective structure remains the core of the research.

[0004] Furthermore, research on compressive strength structures generally focuses on short-term compressive strength, while research on the long-term static pressure resistance of optical cables is insufficient and incomplete. Summary of the Invention

[0005] To address the common mechanical performance defects in existing optical cables, particularly in terms of their resistance to static pressure, the present invention provides a static pressure resistant optical cable. Existing rigid pressure-resistant structures suffer from difficulties in transportation and storage, while elastic pressure-resistant structures are prone to aging and failure.

[0006] The main objective of this invention is:

[0007] I. Improve the static voltage resistance of optical cables;

[0008] II. Effectively coordinate the setting of the protection structure and the protection methods for optical fibers and wires.

[0009] To achieve the above objectives, the present invention adopts the following technical solution.

[0010] A static pressure resistant optical cable, comprising:

[0011] Sheath layer, anti-static frame, optical fiber core and conductive core;

[0012] The sheath layer has an eye-shaped inner cavity at the axis of the optical cable, and two side cavities are provided at each end of the tip of the inner cavity.

[0013] The anti-static pressure frame includes an arc-shaped cover and an arc-shaped head. The arc-shaped cover is fitted to the symmetrical arc-shaped inner walls on both sides of the central axis of the inner cavity. The two ends of the arc-shaped cover extend to the junction of the inner cavities on the radial cross section of the optical cable. The ends are fitted to the wall of the side cavity on one side of the central axis where the arc-shaped cover is located to form a semi-circular arc-shaped head.

[0014] Two symmetrically arranged anti-static pressure skeleton arc-shaped covers form an eye-shaped independent region λ that approximates the inner cavity, isolating the inner cavity from the side cavity;

[0015] The optical fiber core is located in region λ, which is formed by an anti-static skeleton, within the inner cavity, while the conductive core is located in the side cavity.

[0016] As a preferred option

[0017] The line connecting the two tips of the inner cavity is its central axis, and the two side cavities corresponding to each tip are symmetrically arranged around the central axis.

[0018] As a preferred option

[0019] The anti-static pressure type optical cable also includes an inner skeleton;

[0020] The optical fiber core is encased in an inner frame, which is located in region λ.

[0021] As a preferred option

[0022] The inner frame is a rounded regular hexagon in the radial cross-section of the optical cable, and it is symmetrically arranged with the central axis of the optical cable as the center. Each arc-shaped cover has two rounded corners that abut against the inner wall.

[0023] As a preferred option

[0024] The arc-shaped head faces away from the arc-shaped cover opening.

[0025] As a preferred option

[0026] The inner frame is also provided with a branch pipe, and the branch pipe has a groove along its axis circumferentially, with an optical fiber core wire independently installed in each groove.

[0027] As a preferred option

[0028] The grooves are separated by rib structures, and each rib structure is aligned outward with the corner of the inner frame.

[0029] As a preferred option

[0030] The branch pipe has a hollow cavity at its axial center, which is filled with a soft filler or high-pressure protective gas.

[0031] As a preferred option

[0032] The elastic modulus of the material used in the antistatic pressure skeleton is ≥21 MPa;

[0033] The elastic modulus of the material used for the inner skeleton is ≥14 MPa;

[0034] The elastic modulus scalar of the material used for the anti-static pressure skeleton is greater than that of the elastic modulus scalar of the material used for the inner skeleton.

[0035] The beneficial effects of this invention are:

[0036] This invention, through a specific protective structure, forms a lever-like force-guiding structure inside the optical cable, enabling the conductive core part of the optical cable to act as the main force-bearing part, protecting the weak mechanical properties of the optical fiber core with its strong mechanical properties. At the same time, it also has the advantages of convenient transportation and storage, as well as long service life, and its resistance to static pressure will not be weakened after aging and hardening. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the stress deformation of the optical cable of the present invention;

[0039] In the diagram: 100 sheath layer, 101 inner cavity, 102 side cavity, 200 anti-static pressure skeleton, 201 arc-shaped cover, 202 arc-shaped head, 300 inner skeleton, 301 rounded corner, 400 optical fiber core, 500 conductive core, 600 branch pipe, 601 wire groove, 6011 rib structure, 602 middle cavity. Detailed Implementation

[0040] The present invention will be further described clearly and in detail below with reference to specific embodiments and the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the terms "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified, and "several" means one or more.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Unless otherwise specified, all raw materials used in the embodiments of the present invention are commercially available or obtainable by those skilled in the art; unless otherwise specified, all methods used in the embodiments of the present invention are methods mastered by those skilled in the art.

[0044] Example

[0045] One such Figure 1 The anti-static fiber optic cable shown specifically includes:

[0046] Sheath layer 100, anti-static pressure frame 200, inner frame 300, optical fiber core wire 400 and conductive core wire 500;

[0047] The sheath layer 100 has an eye-shaped inner cavity 101 at the axis of the optical cable. The line connecting the two tips of the inner cavity 101 is its central axis. Each end of the tip of the inner cavity 101 has two circular side cavities 102. The two circular side cavities 102 corresponding to each tip are symmetrically arranged about the central axis.

[0048] The anti-static pressure frame 200 includes an arc-shaped cover 201 and an arc-shaped head 202. The arc-shaped cover 201 is fitted to the symmetrical arc-shaped inner walls on both sides of the central axis of the inner cavity 101. The two ends of the arc-shaped cover 201 extend to the junction of the inner cavity 101 on the radial section of the optical cable. The ends are fitted to the wall of the side cavity 102 on one side of the central axis where the arc-shaped cover 201 is located to form a semi-circular arc-shaped arc head 202.

[0049] The arc-shaped head 202 faces away from the opening of the arc-shaped cover 201;

[0050] The two symmetrically arranged anti-static pressure skeletons 200 and the arc-shaped cover 201 form an eye-shaped independent region λ that is approximately the inner cavity 101, which isolates the inner cavity 101 from the side cavity 102.

[0051] The inner frame 300 is set in the region λ formed by the symmetrical anti-static pressure frame 200. It is a regular hexagon with rounded corners 301 on the radial cross section of the optical cable. It is symmetrically arranged with the central axis as the center, and there are two rounded corners 301 abutting each inner wall of each arc-shaped cover 201.

[0052] The optical fiber core 400 is disposed within the inner frame 300, and the conductive core 500 is disposed within the side cavity 102 and in contact with the arc-shaped head 202. The gaps in the side cavity 102 are filled with insulating filler.

[0053] With the cooperation of the above structures, the optical cable of the present invention forms an effective force-conducting lever structure. Conventional pressure-resistant structures include rigid pressure-resistant structures and elastic pressure-resistant structures. Rigid pressure-resistant structures, such as the almost entirely rigid pressure-resistant structure composed of multi-layer stainless steel braided mesh, do have obvious performance advantages in terms of static pressure resistance, but they are prone to increasing the specific gravity of the optical cable, and the pressure resistance is easily conducted to the internal core wires, and bending is difficult. On the other hand, the elastic pressure-resistant structure has better performance in terms of resistance to short-term external force or impact, but it is weaker in terms of static pressure resistance. It is prone to permanent deformation, loss of elasticity, or aging and hardening, losing its original elastic pressure-resistant performance.

[0054] In the above structure, the antistatic pressure skeleton 200 used in this invention is made of rigid silicone rubber with a certain degree of rigidity, such as the commercially available RTVSR silicone rubber with an elastic modulus ≥21MPa used in this embodiment. While not as rigid as metal, its high elastic modulus gives it a relatively "hard" characteristic, but it is essentially still an elastic material. Combined with the commercially available LR3003 silicone rubber (elastic modulus ≥14MPa), which is also relatively "hard," it can form a force-guiding lever. When the two sides corresponding to the arc-shaped cover 201 of the antistatic pressure skeleton 200 in the optical cable are subjected to force, the middle part of the arc-shaped cover 201 is compressed radially inward along the optical cable, i.e., along... Figure 2 When the middle part of the arc-shaped cover 201 is compressed, the inner skeleton 300 is in contact with the inner side of the arc-shaped cover 201. Both the inner skeleton 300 and the anti-static pressure skeleton 200 have high elastic moduli, forming a "lever." The external force on the middle part of the arc-shaped cover 201 is transmitted to the end of the arc-shaped cover 201 and acts on the arc-shaped head 202. The arc-shaped head 202, after receiving the force, transmits it obliquely outward, compressing the conductive core wire 500 in the side cavity 102, thus creating the characteristic of the conductive core wire 500 being subjected to force. Specifically, as shown... Figure 2As shown, the corner where the inner skeleton 300 abuts against the arc-shaped cover 201 serves as a "structural fulcrum" and acts as a "lever fulcrum" during the overall deformation and force conduction process. After the middle part of the arc-shaped cover 201 is compressed and deformed along the a direction, the two sides of the arc-shaped cover 201 in the figure will "raise" along the b direction. This compression and raising also conform to the deformation trend of the inner cavity 101 of the sheath layer 100. After the two sides of the arc-shaped cover 201 are raised along the b direction, they will also drive the arc-shaped head 202 to push out obliquely along the c direction, turning the force to act on the conductive core wire 500.

[0055] In the above process, the conductive core wire 500 is not usually subjected to compression damage due to its excellent mechanical properties. The optical fiber core wire 400 in the inner skeleton 300 can avoid direct stress. Moreover, silicone rubber also has the defect of gradually hardening after aging due to the long-term effect of static pressure. However, the special structure constructed by the present invention transforms this defect into the advantage of forming a force-conducting lever, so that the elastic structure in the optical cable does not lose its compressive strength due to aging, but can be significantly enhanced instead.

[0056] It is also like Figure 2 As shown, before the silicone rubber hardens, the proportions of displacement in the a-direction and the proportion of displacement in the b-direction will be smaller than those after hardening due to the elastic characteristics of the silicone rubber. That is, as the silicone rubber ages, the antistatic pressure effect of the present invention will not only not weaken, but will become more stable or even increase.

[0057] Furthermore,

[0058] The inner frame 300 is also provided with a branch pipe 600. The branch pipe 600 has six wire grooves 601 along its axis. The wire grooves 601 are separated by rib structures 6011. Each wire groove 601 is independently provided with an optical fiber core wire 400, and each rib structure 6011 is aligned with the corner of the inner frame 300.

[0059] Compared to directly and densely filling the fiber core 400 into the inner frame 300, using the branch tube 600 for constraint can avoid the fiber core 400 being subjected to compressive stress. At the same time, aligning the rib structure 6011 with the corner of the inner frame 300 can further prevent the inner frame 300 from being compressed and damaged by the corner shrinkage after being subjected to stress, with the rib structure 6011 bearing the main stress.

[0060] In addition, the branch pipe 600 has a hollow cavity 602 at its axial center, which is filled with a soft filler or high-pressure protective gas to form a buffer and elastic reset capability, thereby enhancing the overall pressure resistance of the branch pipe 600.

Claims

1. A static-pressure resistant optical cable, characterized in that, include: Sheath layer, anti-static frame, optical fiber core and conductive core; The sheath layer has an eye-shaped inner cavity at the axis of the optical cable, and two side cavities are provided at each end of the tip of the inner cavity. The anti-static pressure frame includes an arc-shaped cover and an arc-shaped head. The arc-shaped cover is fitted to the symmetrical arc-shaped inner walls on both sides of the central axis of the inner cavity. The two ends of the arc-shaped cover extend to the junction of the inner cavity and the side cavity on the radial section of the optical cable. The ends are fitted to the wall of the side cavity on one side of the central axis where the arc-shaped cover is located to form a semi-circular arc-shaped head. Two symmetrically arranged anti-static pressure skeleton arc-shaped covers form an eye-shaped independent region λ that approximates the inner cavity, isolating the inner cavity from the side cavity; The optical fiber core is located in region λ, which is composed of an anti-static skeleton, inside the inner cavity, and the conductive core is located in the side cavity. The anti-static pressure type optical cable also includes an inner skeleton; The optical fiber core is encased in an inner frame, which is located in region λ. The inner frame is a rounded regular hexagon in the radial cross-section of the optical cable. It is symmetrically arranged with the central axis of the optical cable as the center, and there are two rounded corners that abut against each inner wall of the arc-shaped cover. The elastic modulus of the material used in the antistatic pressure skeleton is ≥21 MPa; The elastic modulus of the material used for the inner skeleton is ≥14 MPa; The elastic modulus scalar of the material used for the anti-static pressure skeleton is greater than that of the elastic modulus scalar of the material used for the inner skeleton.

2. The anti-static optical cable according to claim 1, characterized in that, The line connecting the two tips of the inner cavity is its central axis, and the two side cavities corresponding to each tip are symmetrically arranged around the central axis.

3. The anti-static optical cable according to claim 1, characterized in that, The arc-shaped head faces away from the arc-shaped cover opening.

4. The anti-static optical cable according to claim 1, characterized in that, The inner frame is also provided with a branch pipe, and the branch pipe has a groove along its axis circumferentially, with an optical fiber core wire independently installed in each groove.

5. The anti-static optical cable according to claim 4, characterized in that, The grooves are separated by rib structures, and each rib structure is aligned outward with the corner of the inner frame.

6. A static-pressure resistant optical cable according to claim 4 or 5, characterized in that, The branch pipe has a hollow cavity at its axial center, which is filled with a soft filler or high-pressure protective gas.

Images