Combined type composite armored optical cable compression-resistant structure

Abstract

The utility model relates to the technical field of armored optical cables, and discloses a combined type composite armored optical cable compression-resistant structure, which sequentially comprises a wire core, an inner sheath, a buffer layer, an armored layer, a sealing layer, a liquid guide layer and an outer sheath from inside to outside. According to the combined type composite armored optical cable compression-resistant structure, through the design of the trapezoidal rings of the armored layer, the longitudinal flexibility of the optical cable is maintained, the mechanical strength of the rings is remarkably enhanced, external extrusion and impact are effectively resisted, the buffer layer is made of an elastic silicone rubber material, mechanical vibration energy is absorbed, the stress damage risk of the internal wire core is reduced, and the service life of the cable is prolonged. And when the sealing layer is damaged, the thermal response repairing adhesive in the cavity of the armor layer directionally flows out through the conical release holes and is quickly cured to form the repairing layer, and the repairing adhesive is guided to diffuse in the specific direction by combining the hydrophobic non-woven fabric and the flow guide grid structure of the liquid guide layer, so that the repairing layer with uniform thickness is formed in the damaged area, and the damage of the sealing layer is avoided. Local accumulation or incomplete coverage of the colloid is avoided, and the repair reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to armored cable technology field, concretely is a combined composite armored cable compression structure. BACKGROUND

[0002] The so-called armored optical fiber is that a protective armor is wrapped on the outside of the optical fiber, and is mainly used for satisfying the requirements of customers such as rat bite prevention and moisture prevention.

[0003] The existing patent (announcement number: CN204883000U) discloses an armored steel wire type ADSS optical cable, which is characterized by being composed of optical fiber, optical fiber oil paste, loose sleeve, reinforcing steel wire, optical cable oil paste, double-layer polyethylene inner layer sheath, aluminum plastic composite belt, armored steel wire and polyethylene outer layer sheath; the utility model has the following advantages and beneficial effects: the utility model has the characteristics of high tensile and compressive strength, good waterproofness, reliable rat prevention performance, resistance to improper torsional bending, no pollution, no harm to human body, simple construction, maintenance cost saving, practicality on kV and above power transmission line towers, obvious rat prevention effect after direct burial of the optical cable, and particular suitability for areas with more plateau rodents, and also applicable to areas with complex working conditions in harsh environments.

[0004] The above optical cable is composed of optical fiber, optical fiber oil paste, loose sleeve, reinforcing steel wire, optical cable oil paste, double-layer polyethylene inner layer sheath, aluminum plastic composite belt, armored steel wire and polyethylene outer layer sheath, however, when the optical cable is impacted by external sharp objects, the outer sheath is easy to break, and external gas and moisture are easy to pass through the gap between the armored steel wire and the aluminum plastic composite belt, thereby causing adverse effects on the internal structure and affecting the service life of the optical cable. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the utility model provides a combined composite armored optical cable compression structure, which has the advantages of self-repairing and solves the problems in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a combined composite armored optical cable compression structure sequentially comprises a core, an inner sheath, a buffer layer, an armored layer, a sealing layer, a liquid guide layer and an outer sheath from inside to outside.

[0007] The armored layer is a compression-resistant pipe body with a plurality of cavity structures, and the cross-section inner wall of the pipe body is provided with a plurality of linearly arranged trapezoidal rings.

[0008] Each cavity is filled with a thermal response repair glue, and each trapezoidal ring of the armored layer is provided with a plurality of tapered release holes, the release holes are closed by the sealing layer in a normal state, when the outer sheath and the sealing layer are damaged, the repair glue flows out through the release holes and solidifies to form a repair layer.

[0009] Further, the cross-section trapezoidal ring thickness of the armor layer is 0.3-0.5 times of the pipe wall thickness.

[0010] Through the above scheme, the graded compression structure is formed by the thickness matching of the trapezoidal ring and the pipe wall, which improves the ring bending strength while ensuring the longitudinal flexibility.

[0011] Further, the inner wall of each release hole is radially formed with an inclined angle of 15-45°.

[0012] Through the above scheme, the inclined angle controls the directional flow of the repair glue.

[0013] Further, the aperture of each release hole is 0.5-2mm.

[0014] Through the above scheme, the micro-pore structure design balances the flow rate of the repair glue, and improves the release stability and continuity.

[0015] Further, the liquid guiding layer is a composite structure, including a hydrophobic non-woven fabric layer attached to a sealing layer and a flow guiding mesh layer attached to an outer sheath, and the mesh size of the flow guiding mesh layer is 2-3 times of the aperture of the release hole.

[0016] Through the above scheme, the composite structure of the liquid guiding layer can realize the directional diffusion of the repair glue, and form a repair layer with uniform thickness.

[0017] Further, the buffer layer is a silicone rubber material.

[0018] Through the above scheme, the mechanical impact can be absorbed by the elastomer material characteristics, and the protection performance is improved.

[0019] Further, the outer surface of the outer sheath is provided with a group of distributed wear-resistant convex balls, and the wear-resistant convex balls are integrally formed with the outer sheath.

[0020] Through the above scheme, the friction coefficient of the outer sheath surface is reduced by the semi-spherical convex structure, and the wear resistance is improved.

[0021] Further, the sealing layer is made of polyurethane elastomer material.

[0022] Through the above scheme, the glue liquid can be sealed and stored when it is not damaged.

[0023] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0024] The combined composite armored optical cable compression structure, through the design of the trapezoidal ring of the armored layer, significantly enhances the mechanical strength of the ring while maintaining the longitudinal flexibility of the optical cable, effectively resists external compression and impact, the buffer layer uses elastic silicone rubber material to absorb mechanical vibration energy, reduces the risk of stress damage to the internal core, improves the overall protection performance, the thermal response repair glue in the cavity of the armored layer flows out in a specific direction through the tapered release hole and solidifies quickly to form a repair layer when the sealing layer is damaged, combined with the hydrophobic non-woven fabric of the liquid guiding layer and the flow guiding grid structure, the repair glue diffuses along a specific direction to form a uniform thickness repair layer in the damaged area, avoiding local accumulation or incomplete coverage of the glue, improving the repair reliability, the wear-resistant convex ball structure distributed on the surface of the outer sheath reduces the friction coefficient, reduces the surface wear caused by construction or environmental friction, prolongs the service life of the outer sheath. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the overall structural diagram of the present application;

[0026] Figure 2 is the armored layer structure sectional view of the present application;

[0027] Figure 3 is the liquid guiding layer structure expansion schematic diagram of the present application;

[0028] Figure 4 is the outer sheath structure of the present application.

[0029] In the figure:

[0030] 1, core; 2, inner sheath; 3, buffer layer;

[0031] 4, armored layer; 401, compression-resistant pipe body; 402, trapezoidal ring; 403, release hole;

[0032] 5, sealing layer;

[0033] 6, liquid guiding layer; 601, hydrophobic non-woven fabric layer; 602, flow guiding grid layer;

[0034] 7, outer sheath; 701, wear-resistant convex ball. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] Please refer to Figure 1 , Figure 2 and Figure 4The anti-pressure structure of the combined composite armored optical cable in the embodiment comprises, from inside to outside, a core 1, an inner sheath 2, a buffer layer 3, an armored layer 4, a sealing layer 5, a liquid guiding layer 6 and an outer sheath 7. The buffer layer 3 is made of silicone rubber material and can absorb mechanical impact through the elastic body material characteristics to improve the protection performance. The outer surface of the outer sheath 7 is provided with a group of wear-resistant convex balls 701 arranged in a distributed manner. The wear-resistant convex balls 701 are integrally formed with the outer sheath 7 and can reduce the surface friction coefficient of the outer sheath 7 through the hemispherical convex structure to improve the wear resistance. The sealing layer 5 is made of polyurethane elastomer material and can seal and store the glue when it is not damaged.

[0037] Please refer to Figure 1 、 Figure 2 and Figure 3 . The armored layer 4 is an anti-pressure pipe body 401 with a plurality of cavity structures. The inner wall of the cross section of the pipe body 401 is provided with a plurality of linearly arranged trapezoidal rings 402. The thickness of the trapezoidal ring 402 of the cross section of the armored layer 4 is 0.3-0.5 times the thickness of the pipe wall. The graded anti-pressure structure is formed by matching the thickness of the trapezoidal ring 402 and the pipe wall, which can improve the ring bending strength while ensuring the longitudinal flexibility. The inner wall of each release hole 403 forms an inclined angle of 15-45° with the radial direction of the armored layer 4. The inclined angle controls the directional flow of the repair glue.

[0038] Please refer to Figure 1 、 Figure 2 and Figure 3 . Each cavity is filled with a thermal response repair glue. Each trapezoidal ring 402 of the armored layer 4 is provided with a plurality of tapered release holes 403. The release holes 403 are closed by the sealing layer 5 in the normal state. When the outer sheath 7 and the sealing layer 5 are damaged, the repair glue flows out through the release holes 403 and solidifies to form a repair layer. The diameter of each release hole 403 is 0.5-2mm. The micro-pore structure design balances the flow rate of the repair glue to improve the release stability and sustainability.

[0039] Please refer to Figure 1 、 Figure 2 and Figure 3 . The liquid guiding layer 6 is a composite structure, including a hydrophobic non-woven fabric layer 601 attached to the sealing layer 5 and a flow guiding mesh layer 602 attached to the outer sheath 7. The mesh size of the flow guiding mesh layer 602 is 2-3 times the diameter of the release hole 403. Through the composite structure of the liquid guiding layer 6, the directional diffusion of the repair glue can be realized, and a repair layer with uniform thickness can be formed.

[0040] The combined composite armored optical cable compression structure in this embodiment, through the design of the trapezoidal ring 402 of the armor layer 4, significantly enhances the mechanical strength of the ring while maintaining the longitudinal flexibility of the optical cable, effectively resisting external compression and impact, the buffer layer 3 uses elastic silicone rubber material to absorb mechanical vibration energy, reduce the risk of stress damage to the internal core 1, and improve the overall protection performance. When the sealing layer 5 is damaged, the thermal response repair glue in the cavity of the armor layer 4 flows out through the conical release hole 403 and quickly solidifies to form a repair layer. Combined with the hydrophobic non-woven fabric and the flow guide grid structure of the liquid guide layer 6, the repair glue diffuses along a specific direction, forming a uniform thickness repair layer in the damaged area, avoiding local accumulation or incomplete coverage of the glue, and improving the repair reliability. The wear-resistant convex ball 701 structure distributed on the surface of the outer sheath 7 reduces the friction coefficient and reduces surface wear caused by construction or environmental friction, prolonging the service life of the outer sheath 7.

[0041] The working principle of the above embodiment is as follows: when the optical cable is compressed by external force, the trapezoidal ring 402 structure of the armor layer 4 can realize the reinforcing rib, improve the overall mechanical strength, and further ensure the compression strength of the armor layer 4. When the outer sheath 7 is damaged due to impact, the polyurethane elastomer material of the sealing layer 5 is also damaged. At this time, the temperature change activates the thermal response repair glue, the glue expands under heat to generate internal pressure, the expanded repair glue flows along the conical release hole 403, and the glue migrates to the direction of the damaged outer sheath 7. After the glue penetrates the sealing layer 5, it enters the liquid guide layer 6. The hydrophobic non-woven fabric layer 601 prevents the glue from penetrating in the opposite direction, and the flow guide grid layer 602 uniformly spreads the glue to the damaged area to form a continuous repair interface. The repair glue that contacts the air solidifies to form a tightly bonded protective layer, preventing water and gas from entering.

[0042] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an "includes a" statement does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0043] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite armored optical cable compression-resistant structure, characterized in that: From the inside out, it includes the wire core (1), inner sheath (2), buffer layer (3), armor layer (4), sealing layer (5), liquid-conducting layer (6) and outer sheath (7); The armor layer (4) is a pressure-resistant tube (401) with multiple cavity structures, and its cross-section inner wall is provided with multiple trapezoidal rings (402) arranged in a linear manner; Each cavity is filled with heat-responsive repair adhesive. Each trapezoidal ring (402) of the armor layer (4) is provided with multiple conical release holes (403). The release holes (403) are normally sealed by the sealing layer (5). When the outer sheath (7) and the sealing layer (5) are damaged, the repair adhesive flows out through the release holes (403) and solidifies to form a repair layer.

2. The composite armored optical cable compression-resistant structure according to claim 1, characterized in that: The thickness of the trapezoidal ring (402) in the cross section of the armor layer (4) is 0.3-0.5 times the thickness of the pipe wall.

3. The composite armored optical cable compression-resistant structure according to claim 1, characterized in that: The inner wall of each of the release holes (403) forms a 15-45° inclined angle with the radial direction of the armor layer (4).

4. The composite armored optical cable compression-resistant structure according to claim 1, characterized in that: The diameter of each of the aforementioned release holes (403) is 0.5-2 mm.

5. The composite armored optical cable compression-resistant structure according to claim 1, characterized in that: The liquid guiding layer (6) is a composite structure, including a hydrophobic nonwoven fabric layer (601) that adheres to the sealing layer (5) and a flow guiding mesh layer (602) that adheres to the outer sheath (7). The mesh size of the flow guiding mesh layer (602) is 2-3 times the aperture of the release hole (403).

6. The composite armored optical cable compression-resistant structure according to claim 1, characterized in that: The buffer layer (3) is made of silicone rubber.

7. The composite armored optical cable compression-resistant structure according to claim 1, characterized in that: The outer surface of the outer sheath (7) is provided with a set of distributed wear-resistant convex balls (701), and the wear-resistant convex balls (701) and the outer sheath (7) are integrally formed.

8. The composite armored optical cable compression-resistant structure according to claim 1, characterized in that: The sealing layer (5) is made of polyurethane elastomer material.

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