An optical cable with special-shaped filling rope

Abstract

The invention belongs to the field of cables, and in particular relates to an optical cable with a special-shaped filling rope. The optical cable comprises an outer sheath, a tape layer, a central reinforcement member and at least three loose tubes, wherein at least one optical communication component is arranged in each loose tube, and the optical cable is characterized in that a filling rope is arranged between two adjacent loose tubes, the filling rope is composed of a base and two forked support plates located at the top of the base, a cavity is formed between the two support plates toward the base, an embedding opening is formed at the top of the cavity, the bottom of the base is arc-shaped and fits with the surface of the central reinforcement member, and in a clockwise direction, the base of a previous filling rope and the support plate on the left side are brought together with the base of a subsequent filling rope and the support plate on the right side to form an elliptical loose tube cavity, the loose tube is located in the loose tube cavity, and an electrical unit is arranged in the cavity; the optical cable has the advantages of simple structure, good heat dissipation performance, resistance to lateral pressure, earthquake resistance, torsion resistance, easy construction and the like.

Description

Technical Field

[0001] The invention belongs to the field of cables, and in particular relates to an optical cable with a special-shaped filling rope. Background Art

[0002] With the large-scale promotion of 5G construction in China, the demand for optical cables is increasing. In some complex environments, optical cables need stronger compressive resistance.

[0003] In the prior art, CN207249204U discloses an explosion-proof optical cable for mining, which is characterized in that: it includes an outer sheath, a steel wire armor is installed in the outer sheath, the outer sheath and the steel wire armor are both circular in cross section and are tightly connected, a central reinforcement is installed in the steel wire armor, a plurality of loose tubes are installed between the outer surface of the central reinforcement and the inner surface of the steel wire armor, a plurality of loose tubes are installed between the outer surface of the central reinforcement and the inner surface of the steel wire armor, and a plurality of filling ropes are installed, and the adjacent loose tubes are connected to each other. Rubber cushions are also distributed between the steel wire armor, between adjacent filling ropes, and between the loose tube and the filling rope. A plurality of annular ribs are installed at equal intervals on the inner surface of the steel wire armor. Limiting grooves are provided on the inner surface of the annular ribs. The limiting grooves are matched with the shapes and sizes of the loose tube and the filling rope. A decompression structure is installed at the contact surface between the limiting groove and the loose tube and the filling rope. An anti-shear strip is also installed on the inner surface of the steel wire armor. The anti-shear strip is parallel to the axial direction of the steel wire armor. The loose tube is filled with fiber paste, and a plurality of optical fibers are distributed in the fiber paste.

[0004] The above-mentioned prior art has the following drawbacks: 1. The optical cable is heavy, and the optical cable is provided with steel wire armor, annular ribs and other materials inside, which increases the weight of the optical cable and brings inconvenience to the construction; 2. The rubber cushion layer is distributed between adjacent loose tubes, between adjacent filling ropes, and between the loose tubes and the filling ropes, and cannot provide compression and seismic protection between the loose tubes and the central reinforcement, and between the loose tubes and the outer sheath. Summary of the invention

[0005] To solve the above problems, the purpose of the present invention is to disclose an optical cable with a special-shaped filling rope, which is achieved by adopting the following technical solutions.

[0006] The invention discloses an optical cable with a special-shaped filling rope, comprising an outer sheath, a tape layer, a central reinforcement and at least three loose tubes, wherein at least one optical communication component is arranged in each loose tube, the loose tube is located outside the central reinforcement, the tape layer is located outside the loose tube, and the outer sheath is extruded outside the tape layer. The invention is characterized in that a filling rope is arranged between two adjacent loose tubes, the filling rope is composed of a base and two forked support plates located at the top of the base, a cavity is formed in the base between the two support plates, an embedding opening is formed at the top of the cavity, the bottom of the base is arc-shaped and fits with the surface of the central reinforcement, and in a clockwise direction, the base and the left support plate of a previous filling rope and the base and the right support plate of a subsequent filling rope are brought together to form an elliptical loose tube cavity, the loose tube is located in the loose tube cavity, an electric unit is arranged in the cavity, the outer diameter of the electric unit is greater than the width of the embedding opening, and the filling rope has elasticity.

[0007] The optical cable with the special-shaped filling rope described above is characterized in that the top ends of the support plates of the two adjacent filling ropes are not in contact when the optical cable is not squeezed.

[0008] When the optical cable is squeezed, the support plates of two adjacent filling ropes contact each other to form a support, thereby improving the lateral pressure resistance of the optical cable. When the optical cable is squeezed, the two support plates of the filling rope can only be separated to both sides, thereby increasing the space of the cavity, enhancing the heat dissipation performance, and effectively preventing the electrical unit from being squeezed. At the same time, the width of the loose tube cavity formed by the two adjacent filling ropes becomes larger, and the loose tube has a certain activity space in the loose tube cavity, thereby preventing the loose tube from being squeezed. When the optical fiber in the loose tube is subjected to excessive lateral squeezing force from the filling ropes on both sides during production, resulting in large additional attenuation, the pressure on the loose tube can be released by squeezing the support plates of the corresponding filling ropes, thereby achieving the goal of repairing the optical cable without rework or destructive repair. At the same time, the filling rope can also enhance the compression resistance of the optical cable through the elasticity of the support plates themselves.

[0009] The optical cable with the special-shaped filling rope described above is characterized in that when the support plates of two adjacent filling ropes conflict with each other, the outer diameter of the electrical unit is greater than the width of the embedding opening.

[0010] The optical cable with a special-shaped filling rope described above is characterized in that the optical communication component is an optical fiber or an optical fiber ribbon formed by at least two optical fibers.

[0011] The optical cable with a special-shaped filling rope described above is characterized in that the optical fiber model is G.652, G.653, G.654, G.655, G.656, G.657, A1a, A1b or A1c.

[0012] The optical cable with a special-shaped filling rope described above is characterized in that the loose tube material is polybutylene terephthalate or modified polypropylene.

[0013] The optical cable with a special-shaped filling rope described above is characterized in that the outer sheath material is low-density polyethylene, medium-density polyethylene, high-density polyethylene, flame-retardant polyolefin or polyvinyl chloride.

[0014] The optical cable with a special-shaped filling rope described above is characterized in that the wrapping layer is a steel belt or an aluminum belt or a water-blocking belt or a non-woven fabric belt.

[0015] The optical cable with a special-shaped filling rope described above is characterized in that the electrical unit is composed of a conductor and an insulating layer extruded outside the conductor.

[0016] The optical cable with a special-shaped filling rope described above is characterized in that the material of the central reinforcement member is steel wire or glass fiber rod.

[0017] The optical cable with special-shaped filling rope described above is characterized in that the material of the filling rope is rubber.

[0018] In the present invention, a triangular air cavity is provided between the two support plates and the wrapping layer of the filling rope, and the heat emitted by the electric unit is dissipated into the air cavity through the embedding port and discharged outside the optical cable, so that the heat dissipation effect is good; the special branch structure of the filling rope also enables the optical cable to have better anti-torsion performance; the embedding port formed on the filling rope allows construction workers to conveniently remove the electric unit from the cavity during construction without destroying the structure of the filling rope, and the loose sleeve can also be taken out through the gap between the support plates of two adjacent filling ropes, thereby improving construction efficiency.

[0019] Therefore, the present invention has the beneficial effects of simple structure, good heat dissipation performance, resistance to lateral pressure, shock resistance, torsion resistance, easy construction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the present invention.

[0021] Figure 2 This is the front view of embodiment 1 of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of Example 2 of the present invention.

[0023] Figure 4 This is the front view of embodiment 2 of the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the filling rope of Example 1 or Example 2 of the present invention.

[0025] Figure 6This is a schematic diagram of the three-dimensional structure of Example 3 of the present invention.

[0026] Figure 7 This is the front view of embodiment 3 of the present invention.

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the reinforcement member of Example 3 of the present invention.

[0028] Fig. 9 This is a schematic diagram of the three-dimensional structure of the filling rope according to Example 3 of the present invention.

[0029] In the figure: 1. outer sheath, 2. tape layer, 3. filling rope, 31. support plate, 32. embedding port, 33. cavity, 34. base, 35. limiting groove, 4. electrical unit, 5. loose tube, 6. optical fiber, 7. central reinforcement member, 71. reinforcement member body, 72. limiting component, 8. optical fiber ribbon. DETAILED DESCRIPTION

[0030] Example 1

[0031] Please see Figure 1 , Figure 2 and Figure 5 , an optical cable with a special-shaped filling rope, comprising an outer sheath 1, a tape layer 2, a central reinforcement member 7 and at least three loose tubes 5, each of which is provided with at least one optical fiber 6, the loose tube 5 is located outside the central reinforcement member 7, the tape layer 2 is located outside the loose tube 5, the outer sheath 1 is extruded outside the tape layer 2, and is characterized in that a filling rope 3 is further provided between two adjacent loose tubes 5, the filling rope 3 is composed of a base 34 and two forked support plates 31 located at the top of the base 34, and the two support plates 31 extend into the base 34. A cavity 33 is formed, and an embedding opening 32 is formed at the top of the cavity 33. The bottom of the base 34 is arc-shaped and fits with the surface of the central reinforcement 7. In the clockwise direction, the base 34 of the previous filling rope 3 and the support plate 31 on the left are brought together with the base 34 of the next filling rope 3 and the support plate 31 on the right to form an elliptical loose tube cavity. The loose tube 5 is located in the loose tube cavity. An electric unit 4 is arranged in the cavity 33. The outer diameter of the electric unit 4 is greater than the width of the embedding opening 32, and the filling rope 3 is elastic.

[0032] Example 2

[0033] Please see Figure 3 , Figure 4 and Figure 5, an optical cable with a special-shaped filling rope, comprising an outer sheath 1, a tape layer 2, a central reinforcement member 7 and at least three loose tubes 5, each of which is provided with at least one optical fiber ribbon 8, the loose tube 5 is located outside the central reinforcement member 7, the tape layer 2 is located outside the loose tube 5, the outer sheath 1 is extruded outside the tape layer 2, and is characterized in that a filling rope 3 is further provided between two adjacent loose tubes 5, the filling rope 3 is composed of a base 34 and two forked support plates 31 located at the top of the base 34, a cavity 33 is formed between the two support plates 31 into the base 34, and an embedding is formed at the top of the cavity 33 The entrance 32, the bottom of the base 34 is arc-shaped and fits with the surface of the central reinforcement member 7. In the clockwise direction, the base 34 of the previous filling rope 3 and the support plate 31 on the left are close to the base 34 of the next filling rope 3 and the support plate 31 on the right to form an elliptical loose tube cavity. The loose tube 5 is located in the loose tube cavity. An electrical unit 4 is provided in the cavity 33. The outer diameter of the electrical unit 4 is greater than the width of the embedding port 32. The filling rope 3 is elastic. The optical fiber ribbon 8 described above is composed of at least two optical fibers 6 and a plurality of optical fiber ribbons 8. The optical fiber ribbons must be stacked.

[0034] Example 3

[0035] Please see Figure 6 , Figure 7 , Figure 8 and Fig. 9 , an optical cable with a special-shaped filling rope, comprising an outer sheath 1, a tape layer 2, a central reinforcement member 7 and at least three loose tubes 5, each of which is provided with at least one optical fiber 6, the loose tube 5 is located outside the central reinforcement member 7, the tape layer 2 is located outside the loose tube 5, the outer sheath 1 is extruded outside the tape layer 2, and is characterized in that a filling rope 3 is further provided between two adjacent loose tubes 5, the filling rope 3 is composed of a base 34 and two forked support plates 31 located at the top of the base 34, a cavity 33 is formed between the two support plates 31 into the base 34, an embedding opening 32 is formed at the top of the cavity 33, the bottom of the base 34 is arc-shaped, and The base 34 is fitted with the surface of the central reinforcement member 7, and a limiting groove 35 is also formed at the bottom of the base 34. The central reinforcement member 7 is composed of a reinforcement member body 71 and a plurality of limiting components 72 located on the surface of the reinforcement member. The limiting components 72 are inserted into the limiting groove 35 to fix the filling rope 3. In a clockwise direction, the base 34 of the previous filling rope 3 and the support plate 31 on the left are brought together with the base 34 of the next filling rope 3 and the support plate 31 on the right to form an elliptical loose tube cavity. The loose tube 5 is located in the loose tube cavity. An electric unit 4 is provided in the cavity 33. The outer diameter of the electric unit 4 is greater than the width of the embedding port 32, and the filling rope 3 is elastic.

[0036] The optical cable with the special-shaped filling rope described above is characterized in that the top ends of the support plates 31 of the two adjacent filling ropes 3 are not in contact when the optical cable is not squeezed.

[0037] When the optical cable is squeezed, the support plates 31 of two adjacent filling ropes 3 collide with each other to form a support, thereby improving the lateral pressure resistance of the optical cable. When the optical cable is squeezed, the two support plates 31 of the filling rope 3 can only be separated to both sides, thereby increasing the space of the cavity 33, enhancing the heat dissipation performance, and effectively preventing the electrical unit 4 from being squeezed. At the same time, the width of the loose tube cavity formed by the two adjacent filling ropes 3 becomes larger, and the loose tube 5 has a certain activity space in the loose tube cavity to prevent the loose tube 5 from being squeezed. When the optical fiber 6 in the loose tube 5 is subjected to excessive lateral squeezing force from the filling ropes 3 on both sides during production, resulting in large additional attenuation, the pressure on the loose tube 5 can be released by squeezing the support plates 31 of the corresponding filling ropes 3, thereby achieving the goal of repairing the optical cable without rework or destructive repair. At the same time, the filling rope 3 can also enhance the compression and seismic resistance of the optical cable through the elasticity of the support plates 31 themselves.

[0038] The optical cable with the special-shaped filling rope described above is characterized in that when the support plates 31 of two adjacent filling ropes 3 collide with each other, the outer diameter of the electrical unit 4 is greater than the width of the embedding opening 32 .

[0039] The optical cable with a special-shaped filling rope described in any of the above embodiments is characterized in that the type of the optical fiber 6 is G.652, G.653, G.654, G.655, G.656, G.657, A1a, A1b or A1c.

[0040] An optical cable with a special-shaped filling rope as described in any of the above embodiments, characterized in that the loose tube 5 is made of polybutylene terephthalate or modified polypropylene.

[0041] The optical cable with a special-shaped filling rope described in any of the above embodiments is characterized in that the material of the outer sheath 1 is low-density polyethylene, medium-density polyethylene, high-density polyethylene, flame-retardant polyolefin, or polyvinyl chloride.

[0042] The optical cable with a special-shaped filling rope described in any of the above embodiments is characterized in that the wrapping layer 2 is a steel tape or an aluminum tape or a water-blocking tape or a non-woven fabric tape.

[0043] The optical cable with a special-shaped filling rope described in any of the above embodiments is characterized in that the electrical unit 4 is composed of a conductor and an insulating layer extruded outside the conductor.

[0044] The optical cable with a special-shaped filling rope described in any of the above embodiments is characterized in that the material of the central reinforcement member 7 is steel wire or glass fiber rod.

[0045] The optical cable with special-shaped filling ropes described in any of the above embodiments is characterized in that the material of the filling rope 3 is rubber.

[0046] In the present invention, there is a triangular air cavity between the two support plates 31 of the filling rope 3 and the wrapping layer 2. The heat emitted by the electric unit is dissipated into the air cavity through the embedding port 32 and discharged outside the optical cable, so the heat dissipation effect is good. The special branch structure of the filling rope 3 also makes the optical cable have better anti-torsion performance. The embedding port 32 formed on the filling rope 3 allows construction workers to easily remove the electric unit 4 from the cavity 33 during construction without destroying the structure of the filling rope 3. The loose sleeve can also be taken out through the gap between the support plates 31 of two adjacent filling ropes 3, thereby improving construction efficiency.

[0047] The invention solves the problems in the prior art that the optical cable is heavy, and the pressure resistance and earthquake resistance protection between the loose tube and the central reinforcement member, and between the loose tube and the outer sheath are poor.

[0048] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An optical cable with a special-shaped filling rope, comprising an outer sheath (1), a tape layer (2), a central reinforcement member (7) and at least three loose tubes (5), each of which has at least one optical communication component, wherein the loose tube (5) is located outside the central reinforcement member (7), the tape layer (2) is located outside the loose tube (5), and the outer sheath (1) is extruded outside the tape layer (2), characterized in that: A filling rope (3) is also provided between two adjacent loose tubes (5), the filling rope (3) being composed of a base (34) and two forked support plates (31) located at the top of the base (34), a cavity (33) is formed between the two support plates (31) into the base (34), an embedding opening (32) is formed at the top of the cavity (33), the bottom of the base (34) is arc-shaped and fits the surface of a central reinforcement member (7), a limiting groove (35) is also formed at the bottom of the base (34), the central reinforcement member (7) is composed of a reinforcement member body 71 and a plurality of limiting components (72) located on the surface of the reinforcement member, and the limiting components (72) are snapped into the limiting groove (35) A filling rope (3) is fixed inside the filling rope (3), and in a clockwise direction, a base (34) of a previous filling rope (3) and a support plate (31) on the left side are brought together with a base (34) of a subsequent filling rope (3) and a support plate (31) on the right side to form an elliptical loose tube cavity, wherein the loose tube (5) is located in the loose tube cavity, an electric unit (4) is arranged in the cavity (33), the outer diameter of the electric unit (4) is greater than the width of the embedding port (32), and the filling rope (3) is elastic; the top ends of the support plates (31) of two adjacent filling ropes (3) are not in contact when the optical cable is not squeezed; when the optical cable is squeezed, the support plates of the two adjacent filling ropes conflict with each other to form a support.

2. The optical cable with a special-shaped filling rope according to claim 1, characterized in that: When the support plates (31) of two adjacent filling ropes (3) collide with each other, the outer diameter of the electric unit (4) is greater than the width of the embedding opening (32).

3. The optical cable with a special-shaped filling rope according to claim 2, characterized in that: The optical communication component is an optical fiber (6) or an optical fiber ribbon (8) formed by ribbonizing at least two optical fibers (6).

4. The optical cable with a special-shaped filling rope according to claim 3, characterized in that: The optical fiber (6) is of type G.652, G.653, G.654, G.655, G.656, G.657, A1a, A1b or A1c.

5. The optical cable with a special-shaped filling rope according to claim 4, characterized in that: The material of the loose tube (5) is polybutylene terephthalate or modified polypropylene.

6. The optical cable with a special-shaped filling rope according to claim 5, characterized in that: The material of the outer protective layer (1) is low-density polyethylene, medium-density polyethylene, high-density polyethylene, flame-retardant polyolefin or polyvinyl chloride.

7. The optical cable with a special-shaped filling rope according to claim 6, characterized in that: The wrapping tape layer (2) is a steel tape, an aluminum tape, a water-blocking tape, or a non-woven fabric tape.

8. The optical cable with a special-shaped filling rope according to claim 7, characterized in that: The electrical unit (4) is composed of a conductor and an insulating layer extruded outside the conductor.

9. The optical cable with a special-shaped filling rope according to claim 8, characterized in that: The material of the central reinforcement member (7) is steel wire or glass fiber rod; the material of the filling rope (3) is rubber.

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