An anti-tensile and lightning-proof optical cable for a base station tower

Abstract

The present invention discloses a tensile and lightning-proof optical cable for a base station tower in the technical field of optical cables, including a central strengthening member. An optical fiber unit is arranged inside the loose tube. An inner sheath is arranged on the outer wall of the loose tube. A fiberglass mesh layer is arranged on the outer wall of the inner sheath. A waterproof layer is arranged on the outer wall of the fiberglass mesh layer. A mating tensile elastic sleeve two is arranged on the outer wall of the tensile elastic sleeve one. A water-blocking tape is arranged on the outer wall of the tensile elastic sleeve two. A flame-retardant polyvinyl chloride sheath is arranged on the outer wall of the water-blocking tape. The optical cable in the present invention adopts a metal-free structure design, effectively achieving the performance of preventing lightning introduction. At the same time, this optical cable adopts a water-blocking tape to achieve the first layer of waterproof performance. The arranged waterproof layer can minimize the entry of water. At the same time, in cooperation with the internal water-blocking fiber paste and water-blocking material, the entered water will not cause the problem of deterioration of the optical cable transmission performance, making the optical cable have excellent lightning protection and waterproof performance.

Description

Technical Field

[0001] The present invention relates to the technical field of optical cables, and specifically relates to a tensile and lightning-proof optical cable for a base station tower. Background Technique

[0002] At present, optical cables are widely used in communication facilities in industrial production and construction projects. There are the following several defects in the existing optical cables used for base station towers: 1. The existing optical cables have poor lightning protection effect. The equipment connected to the optical cables is mobile communication equipment, not power equipment. Therefore, once struck by lightning, it will cause damage to the communication equipment. When the optical cable itself is struck by lightning, rainwater will enter the optical cable, resulting in deterioration of the optical cable signal transmission performance when the optical cable encounters water; 2. The use of optical cables on base station towers is due to vertical use, so the tensile strength requirement is relatively high. The existing optical cables cannot meet the use requirements in terms of tensile strength. For this reason, we propose a tensile and lightning-proof optical cable for a base station tower. Summary of the Invention

[0003] The purpose of the present invention is to provide a tensile and lightning-proof optical cable for a base station tower to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A tensile and lightning-proof optical cable for a base station tower, including a central strengthening member. Loose tubes are evenly arranged in a circular array on the outer wall of the central strengthening member. Optical fiber units are arranged in the loose tubes. An inner sheath is arranged on the outer wall of the loose tubes. A water-blocking fiber paste is filled between the inner wall of the inner sheath and the outer wall of the central strengthening member. A fiberglass mesh layer is arranged on the outer wall of the inner sheath. A waterproof layer is arranged on the outer wall of the fiberglass mesh layer. A first tensile elastic sleeve is arranged on the outer wall of the waterproof layer. A second tensile elastic sleeve that matches with the first tensile elastic sleeve is arranged on the outer wall of the first tensile elastic sleeve. A water-blocking tape is arranged on the outer wall of the second tensile elastic sleeve. A flame-retardant polyvinyl chloride sheath is arranged on the outer wall of the water-blocking tape.

[0005] Further, annular elastic protrusions one are evenly and fixedly arranged at equal intervals on the outer wall of the first tensile elastic sleeve. Annular elastic protrusions two are evenly and fixedly arranged at equal intervals on the inner wall of the second tensile elastic sleeve, and the annular elastic protrusions one and the annular elastic protrusions two are mutually staggered and fitted and connected together.

[0006] Further, a water-blocking material is filled between the loose tube and the optical fiber unit.

[0007] Further, assembly cavities are longitudinally opened in a circular array in the inner sheath, and non-metallic strengthening members are fixedly embedded in the assembly cavities.

[0008] Further, wear-resistant protrusions are evenly arranged in a circular array on the outer wall of the flame-retardant polyvinyl chloride sheath.

[0009] Furthermore, arc-shaped fixing grooves matching the loose tubes are provided on the outer wall of the central strengthening member and the inner wall of the inner sheath.

[0010] Furthermore, the number of the loose tubes is three groups, and the three groups of loose tubes are distributed on the outer wall of the central strengthening member along a circular array.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1) The optical cable in the present invention adopts a metal-free structure design, which effectively plays the performance of preventing lightning introduction. At the same time, the optical cable adopts a water-blocking tape to play the first layer of waterproof performance. When the water-blocking tape is damaged, the provided waterproof layer can prevent the entry of water to the minimum extent. At the same time, in cooperation with the internal water-blocking fiber paste and water-blocking material, the entered water will not cause the problem of deterioration of the optical cable transmission performance, so that the optical cable has excellent lightning protection and waterproof performance;

[0013] 2) The present invention adopts a central strengthening member, and the central strengthening member is composed of aramid yarn or aramid rope, with good flexibility, reducing the tension that needs to be borne during construction and vertical laying. The non-metallic strengthening member is adopted, which well improves the shrinkage performance of the inner sheath of the optical cable while playing a tensile role. The tensile elastic sleeve one and the tensile elastic sleeve two are provided. Through the cooperation of the annular elastic protrusion one and the annular elastic protrusion two, the tensile capacity of the optical cable is greatly improved, the tension is buffered, and the service life is prolonged. The provided glass fiber mesh layer has high strength and high toughness, further improving the tensile and bending resistance performance of the optical cable, and at the same time improving the overall strength of the optical cable. The overall tensile performance of the optical cable is high, and the situation of bending and breaking will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is a schematic structural diagram of the tensile elastic sleeve one of the present invention.

[0016] In the figure: 1, central strengthening member; 2, loose tube; 3, optical fiber unit; 4, inner sheath; 5, water-blocking fiber paste; 6, non-metallic strengthening member; 7, glass fiber mesh layer; 8, waterproof layer; 9, tensile elastic sleeve one; 91, annular elastic protrusion one; 10, tensile elastic sleeve two; 101, annular elastic protrusion two; 11, water-blocking tape; 12, flame-retardant polyvinyl chloride sheath; 121, wear-resistant protrusion; 13, water-blocking material. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figure 1-2 , the present invention provides a technical solution: a tensile and lightning-proof optical cable for a base station tower. Please refer to Figure 1 , including a central strengthening member 1. The central strengthening member 1 in the present invention can be composed of aramid yarn or aramid rope, which has high strength and good flexibility, can reduce the tensile force that the optical cable needs to bear, improve the bending performance of the optical cable, and facilitate the laying and use of the optical cable;

[0019] Please refer to Figure 1 , a loose tube 2 is uniformly arranged in an annular array on the outer wall of the central strengthening member 1. The loose tube 2 is used to protect the internal optical fiber unit 3;

[0020] Please refer to Figure 1 , an optical fiber unit 3 is arranged in the loose tube 2. The optical fiber unit 3 can be an optical fiber, an optical fiber bundle or an optical fiber ribbon. Since it belongs to the prior art, no specific limitation is made here;

[0021] Please refer to Figure 1 , an inner sheath 4 is arranged on the outer wall of the loose tube 2. A water-blocking fiber paste 5 is filled between the inner wall of the inner sheath 4 and the outer wall of the central strengthening member 1. The water-blocking fiber paste 5 makes the inside more compact and mainly plays a water-blocking role;

[0022] Please refer to Figure 1 , a glass fiber mesh layer 7 is arranged on the outer wall of the inner sheath 4. The glass fiber mesh layer 7 has high strength and high toughness, further improves the tensile and bending resistance performance of the optical cable, and at the same time also improves the overall strength of the optical cable;

[0023] Please refer to Figure 1 , a waterproof layer 8 is arranged on the outer wall of the glass fiber mesh layer 7. The waterproof layer 8 can adopt a high water-absorbing resin layer. The high water-absorbing resin layer is insoluble in water and also insoluble in organic solvents, can absorb hundreds to thousands of times its own weight of water, and has strong water retention. Even when pressure is applied, the water will not be squeezed out. In case the outer wall of the optical cable is damaged, the high water-absorbing resin at the wound part will expand and play a sealing effect, and can prevent the entry of water to the minimum extent;

[0024] Please refer to Figure 1 , a first tensile elastic sleeve 9 is arranged on the outer wall of the waterproof layer 8, and a second tensile elastic sleeve 10 that matches with it is arranged on the outer wall of the first tensile elastic sleeve 9. The first tensile elastic sleeve 9 and the second tensile elastic sleeve 10 are used in cooperation to improve the tensile performance of the optical cable;

[0025] Please refer to Figure 1 , a water-blocking tape 11 is provided on the outer wall of the tensile elastic sleeve II 10. The water-blocking tape 11 can be made of polyester non-woven fabric. In actual situations, in order to further improve the water-blocking performance, waterproof ointment is applied on the outside, which can further prevent water. A flame-retardant polyvinyl chloride sheath 12 is provided on the outer wall of the water-blocking tape 11.

[0026] As Figure 2 shown: annular elastic protrusions I 91 are evenly and fixedly arranged on the outer wall of the tensile elastic sleeve I 9 at equal intervals. Annular elastic protrusions II 101 are evenly and fixedly arranged on the inner wall of the tensile elastic sleeve II 10 at equal intervals. And the annular elastic protrusions I 91 and the annular elastic protrusions II 101 are mutually staggered and fitted and connected together. The annular elastic protrusions I 91 and the annular elastic protrusions II 101 are both made of elastic materials. Through the mutual meshing force of the annular elastic protrusions I 91 and the annular elastic protrusions II 101, the tensile performance of the optical cable is improved;

[0027] As Figure 1 shown: a water-blocking material 13 is filled between the loose tube 2 and the optical fiber unit 3. The water-blocking material 13 can be one or more of ointment, water-blocking powder, and water-blocking rope;

[0028] As Figure 1 shown: assembly cavities are longitudinally formed in an annular array inside the inner sheath 4, and non-metallic strengthening members 6 are fixedly embedded in the assembly cavities. The non-metallic strengthening members 6 improve the tensile performance of the optical cable. The non-metallic strengthening members 6 have been disclosed in the prior art. For example, in the patent number "CN201420340683.0", it has been disclosed that "the present invention includes a cable core, a strengthening member, and a protective layer. The protective layer is coated on the outside of the cable core and the strengthening member, and the protective layer is composed of a water-blocking tape, a ceramic fiber tape, and an outer sheath"; "two parallel non-metallic strengthening members are embedded in the sheath of the present invention, which not only plays a tensile role but also well improves the shrinkage performance of the optical cable sheath";

[0029] As Figure 1 shown: wear-resistant protrusions 121 are evenly arranged in an annular array on the outer wall of the flame-retardant polyvinyl chloride sheath 12. The wear-resistant protrusions 121 can be bonded to the outer wall of the flame-retardant polyvinyl chloride sheath 12 by a waterproof adhesive layer. The wear-resistant protrusions 121 improve the wear-resistant performance of the flame-retardant polyvinyl chloride sheath 12 and extend the service life. The wear-resistant protrusions 121 can be made of wear-resistant rubber material;

[0030] As Figure 1 shown: arc-shaped fixing grooves matching the loose tube 2 are formed on the outer wall of the central strengthening member 1 and the inner wall of the inner sheath 4, which play a certain limiting role on the loose tube 2;

[0031] As Figure 1As shown: The number of loose tubes 2 is three groups, and the three groups of loose tubes 2 are all distributed along the annular array on the outer wall of the central strengthening member 1 for protecting the internal optical fiber unit 3.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensile and lightning-proof optical cable for a base station tower, comprising a central strengthening member (1), characterized in that: The outer wall of the central strengthening member (1) is evenly provided with loose tubes (2) in an annular array. An optical fiber unit (3) is arranged inside the loose tube (2). An inner sheath (4) is arranged on the outer wall of the loose tube (2). A water-blocking fiber paste (5) is filled between the inner wall of the inner sheath (4) and the outer wall of the central strengthening member (1). A fiberglass mesh layer (7) is arranged on the outer wall of the inner sheath (4). A waterproof layer (8) is arranged on the outer wall of the fiberglass mesh layer (7). A first tensile elastic sleeve (9) is arranged on the outer wall of the waterproof layer (8). A second tensile elastic sleeve (10) that matches with the first tensile elastic sleeve (9) is arranged on the outer wall of the first tensile elastic sleeve (9). A water-blocking tape (11) is arranged on the outer wall of the second tensile elastic sleeve (10). A flame-retardant polyvinyl chloride sheath (12) is arranged on the outer wall of the water-blocking tape (11). First annular elastic protrusions (91) are fixedly arranged on the outer wall of the first tensile elastic sleeve (9) at equal intervals and evenly. Second annular elastic protrusions (101) are fixedly arranged on the inner wall of the second tensile elastic sleeve (10) at equal intervals and evenly. The first annular elastic protrusions (91) and the second annular elastic protrusions (101) are mutually staggered and fitted and connected together. A water-blocking material (13) is filled between the loose tube (2) and the optical fiber unit (3). Assembly cavities are longitudinally formed in an annular array inside the inner sheath (4), and non-metallic strengthening members (6) are fixedly embedded in the assembly cavities. Wear-resistant protrusions (121) are evenly arranged on the outer wall of the flame-retardant polyvinyl chloride sheath (12) in an annular array. Arc-shaped fixing grooves that match with the loose tube (2) are formed on the outer wall of the central strengthening member (1) and the inner wall of the inner sheath (4). The number of the loose tubes (2) is three groups, and the three groups of loose tubes (2) are all distributed along the annular array on the outer wall of the central strengthening member (1).

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