Layered stranded optical cable

Abstract

The application relates to the technical field of optical cables, in particular to a layer-stranded optical cable which comprises optical fibers, loose sleeves, counterweights, sleeves and sheaths; the optical fibers are provided with multiple optical fibers; the multiple optical fibers are sleeved in the interiors of the loose sleeves; the counterweights are slidably sleeved in the interiors of the sleeves and used for increasing the weight of the optical cable; the loose sleeves and the sleeves are all sleeved in the interiors of the sheaths; by extracting or withdrawing the counterweights into the optical cable, the gravity of the optical cable is changed, the optical cable is automatically floated or sunk, the application does not need construction personnel to dive for repair or a special salvage construction ship to salvage the optical cable above the water surface for joint repair, and the optical cable can be simply extracted to float up.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical cable, in particular to a layer-stranded optical cable. BACKGROUND

[0002] With the rapid development of the communication industry, the development of optical fiber cables is also getting better and better, and the types are also increasing. Optical cables are distributed in valleys, lakes, oceans, skies, and underground. Installing optical cables in lakes and oceans requires the optical cable itself to have a large gravity so that it can naturally sink underwater. It is difficult to maintain the laid optical cable. In the prior art, it is often necessary for construction personnel to dive for repair or use a special salvage construction ship to salvage the optical cable to the water surface for joint repair, and then sink the repaired optical cable underwater. The construction steps are complicated and labor-intensive. This is because the optical cable itself cannot automatically float up.

[0003] At present, how to make the optical cable automatically float up when it needs to be maintained and automatically sink after the maintenance is completed has become a technical problem to be solved by those skilled in the art. SUMMARY

[0004] The present application provides a layer-stranded optical cable that automatically floats up when it needs to be maintained and automatically sinks after the maintenance is completed.

[0005] The present application provides a layer-stranded optical cable, comprising:

[0006] Optical fibers; the optical fibers are provided with a plurality of;

[0007] Loose tubes; the plurality of optical fibers are sleeved inside the loose tubes;

[0008] Counterweight;

[0009] Sleeves; the counterweight is slidably sleeved inside the sleeves to increase the weight of the optical cable;

[0010] Sheaths; the loose tubes and the sleeves are both sleeved inside the sheaths.

[0011] In some embodiments, the inside of the loose tube is provided with a water-blocking material A.

[0012] In some embodiments, the inside of the sheath is sleeved with a reinforcing member, and the reinforcing member abuts against the loose tube and the sleeve, respectively.

[0013] In some embodiments, the inside of the sheath is further sleeved with a water-blocking material B and a water-blocking material C, the water-blocking material B abuts against the reinforcing member and the sleeve, respectively, and the water-blocking material C abuts against the loose tube and the reinforcing member, respectively.

[0014] In some embodiments, the inside of the sleeve is provided with a water-blocking material D.

[0015] In some embodiments, the inner part of the sheath is provided with a filler.

[0016] In some embodiments, the filler comprises: filler A, filler B and filler C; the filler A is in abutment with the loose tube and the sheath respectively, the filler B is in abutment with the loose tube, the tube and the sheath respectively, and the filler C is in abutment with the tube and the sheath respectively.

[0017] In some embodiments, the outer part of the sheath is provided with a reinforcing layer, and the outer part of the reinforcing layer is provided with an outer coating layer.

[0018] In some embodiments, the loose tube and the tube are both provided with two groups, and are arranged circumferentially in the inner part of the sheath.

[0019] In some embodiments, the weight member is a steel wire, a lead wire or an insulated wire.

[0020] The beneficial effects of the present application are as follows: the layer-stranded optical cable of the present application is used underwater, when maintenance is needed, driving components are arranged on the part of the optical cable above water at both ends, for winding and unwinding the line rope, one end of the line rope is tied to the weight member, and the other end is connected to the output end of the driving component, the driving component on the latter side winds the rope, the driving component on the other side unwinds the rope, and the weight member is pulled out, at this time the line rope is inside the optical cable, the weight of the optical cable is greatly reduced, and the gravity is less than the buoyancy, so the optical cable will float to the water surface, which is convenient for maintenance, after the maintenance is completed, the two groups of driving components are reversed, the weight member is pulled back into the optical cable, at this time the gravity of the optical cable is greater than the buoyancy, and the optical cable will automatically sink, and then the line rope is removed, thus the whole maintenance work is completed. Compared with the prior art, the technical scheme of the present application does not need construction personnel to dive for repair or a special salvage construction ship to salvage the optical cable above the water surface for joint repair, but only needs to simply pull out the weight member to make the optical cable float. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structure schematic diagram of some specific embodiments of the layer-stranded optical cable of the present application;

[0022] In the drawings, 1 is an optical fiber; 2 is water-blocking material A; 3 is a loose tube; 4 is a reinforcing member; 5 is water-blocking material B; 6 is a weight member; 7 is water-blocking material D; 8 is a tube; 9 is a filler; 91 is filler A; 92 is filler B; 93 is filler C; 10 is a sheath; 11 is a reinforcing layer; 12 is an outer coating layer; and 13 is water-blocking material C. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Currently, optical cables are widely used, and can be installed in lakes and oceans. Once laid, these cables are underwater, where the harsh working environment makes subsequent maintenance difficult. Often, workers need to dive to repair them, or specialized salvage vessels are required to retrieve the cables to the surface for splice repair. However, the underwater installation process results in significant weight, preventing the cables from floating automatically. Therefore, how to enable optical cables to float automatically when maintenance is needed and sink automatically after maintenance has become a pressing technical problem for those skilled in the art.

[0025] To solve the above problems, refer to Figure 1 The present invention provides a stranded optical cable, including optical fiber 1; the optical fiber 1 is provided with multiple fibers;

[0026] Loose tube 3; multiple optical fibers 1 are sleeved inside the loose tube 3;

[0027] Counterweight 6;

[0028] Sleeve 8; The counterweight 6 is slidably sleeved inside the sleeve 8 to increase the weight of the optical cable;

[0029] Sheath 10; both the loose tube 3 and the sleeve 8 are fitted inside the sheath 10;

[0030] Specifically, optical fiber 1 is used to transmit data, and loose tube 3 can protect optical fiber 1. Optical fiber 1 is a UV-cured colored optical fiber, which enhances the identification of optical fiber 1. The material of loose tube 3 is polybutylene terephthalate or modified polypropylene. Polybutylene terephthalate has a relative density of 1.31 to 1.55 and a low water absorption rate of only 0.07%. It possesses excellent toughness and fatigue resistance, high impact strength, self-lubricating and wear-resistant properties, a low coefficient of friction, good dimensional stability, excellent electrical properties, and good arc resistance. Modified polypropylene has high strength and hardness, good wear resistance and impact resistance, and good corrosion resistance. Therefore, regardless of which material is used, the service life of the loose tube 3 can be guaranteed. The material of the sleeve 8 is polyethylene or polypropylene. Polyethylene has good low-temperature resistance, with a minimum operating temperature of -100°C to -70°C. It has high strength and wear resistance, making it suitable for manufacturing various parts and components. It also has high corrosion resistance, effectively resisting chemical corrosion. As a material used in optical cables, it can adapt to various environments and has a long service life. Polypropylene has excellent mechanical properties; except for impact resistance, its other mechanical properties are superior to those of polyethylene. The material used for the sheath 10 is low-density polyethylene or foamed plastic. Low-density polyethylene has good flexibility, extensibility, cold resistance, and chemical stability, while foamed plastic has excellent impact and vibration energy absorption.

[0031] Preferably, the loose sleeve 3 is provided with a water-blocking material A2 inside.

[0032] Preferably, a reinforcing member 4 is provided inside the sheath 10, and the reinforcing member 4 abuts against the loose tube 3 and the sleeve 8 respectively;

[0033] Specifically, the reinforcing member 4 is used to bear part of the tensile force. The material used is an aramid-reinforced plastic rod, which is mainly composed of aramid fibers and a plastic matrix. Aramid fibers have excellent mechanical properties, which makes the aramid-reinforced plastic rod have high strength and modulus. At the same time, it also has good lightweight characteristics. The optical cable is densely filled and is not easy to deform.

[0034] Preferably, the sheath 10 is further fitted with water-blocking material B5 and water-blocking material C13. The water-blocking material B5 abuts against the reinforcing member 4 and the sleeve 8 respectively, and the water-blocking material C13 abuts against the loose sleeve 3 and the reinforcing member 4 respectively.

[0035] Specifically, the reinforcing member 4 is located at the axial position inside the sheath 10.

[0036] Preferably, the inside of the sleeve 8 is provided with a water-blocking material D7;

[0037] Specifically, water-blocking materials A2, B5, C13, and D7 can prevent longitudinal water seepage. The materials used are water-blocking grease or water-blocking yarn. Both water-blocking grease and water-blocking yarn are active water-blocking materials with strong water absorption and high expansion rate. They can strongly absorb water, expand rapidly, block water penetration, and protect the interior of the optical cable.

[0038] Preferably, the sheath 10 is provided with a filler 9 inside;

[0039] Specifically, the lighter filler 9 can improve the buoyancy of the optical cable. The material used for filler 9 is foamed plastic rope, which is a type of rope made of plastic. Its main component is usually polypropylene. Foamed plastic rope has high strength and wear resistance, can withstand greater tensile force and weight, is not easily corroded by chemical substances, and has good acid and alkali resistance.

[0040] Preferably, the filler 9 includes: filler A91, filler B92 and filler C93; filler A91 abuts against the loose tube 3 and the sheath 10 respectively, filler B92 abuts against the loose tube 3, the sleeve 8 and the sheath 10 respectively, and filler C93 abuts against the sleeve 8 and the sheath 10 respectively.

[0041] Preferably, the outer side of the sheath 10 is provided with a reinforcing layer 11, and the outer side of the reinforcing layer 11 is provided with an outer sheath layer 12;

[0042] Specifically, the reinforcing layer 11 is flexible and provides good mechanical properties. The sheath 10 and the outer sheath 12 axially isolate moisture inside the optical cable. The material used for the reinforcing layer 11 is high-modulus aramid, which has excellent chemical stability, is resistant to acids and alkalis, and has good dimensional stability. The outer sheath 12 is made of high-density polyethylene, which has excellent chemical resistance, electrical insulation, low-temperature resistance, and impermeability, thus completely preventing water leakage from the cable.

[0043] Preferably, both the loose sleeve 3 and the sleeve 8 are provided in two sets, and are arranged circumferentially inside the sheath 10.

[0044] Preferably, the counterweight 6 is a steel wire, lead wire, or insulated wire;

[0045] Specifically, when the counterweight 6 is an insulated wire, it will become a hybrid optical-electric cable.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] 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.

[0049] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A stranded optical cable, characterized in that, include: Optical fiber (1); multiple optical fibers (1) are provided; Loose tube (3); multiple optical fibers (1) are sleeved inside the loose tube (3); Counterweight (6); Sleeve (8); The counterweight (6) is slidably sleeved inside the sleeve (8) to increase the weight of the optical cable; Sheath (10); both the loose tube (3) and the sleeve (8) are fitted inside the sheath (10); The sheath (10) is fitted with a reinforcing member (4) inside, and the reinforcing member (4) abuts against the loose tube (3) and the sleeve (8) respectively; The sheath (10) is filled with a filler (9). The loose sleeve (3) is provided with a water-blocking material A (2) inside; The sheath (10) is also fitted with water-blocking material B (5) and water-blocking material C (13). The water-blocking material B (5) abuts against the reinforcing member (4) and the sleeve (8) respectively, and the water-blocking material C (13) abuts against the loose sleeve (3) and the reinforcing member (4) respectively. The sleeve (8) is provided with a water-blocking material D (7); The filler (9) includes: filler A (91), filler B (92) and filler C (93); filler A (91) abuts against the loose tube (3) and the sheath (10) respectively, filler B (92) abuts against the loose tube (3), the sleeve (8) and the sheath (10) respectively, and filler C (93) abuts against the sleeve (8) and the sheath (10) respectively.

2. The stranded optical cable according to claim 1, characterized in that, The sheath (10) is provided with an outer reinforcing layer (11), and the outer sheath (12) is provided on the outside of the reinforcing layer (11).

3. The stranded optical cable according to claim 1, characterized in that, Both the loose sleeve (3) and the sleeve (8) are provided in two sets and are arranged circumferentially inside the sheath (10).

4. A stranded optical cable according to claim 1, characterized in that, The counterweight (6) is made of steel wire, lead wire or insulated wire.

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